[1] : The Collaborative International Dictionary of English v.0.48

pitch \pitch\, n.
   1. a throw; a toss; a cast, as of something from the hand;
      as, a good pitch in quoits.
      1913 webster

   pitch and toss, a game played by tossing up a coin, and
      calling "heads or tails;" hence:

   to play pitch and toss with anything, to be careless or
      trust to luck about it. "to play pitch and toss with the
      property of the country." --g. eliot.

   pitch farthing. see chuck farthing, under 5th chuck.
      1913 webster

   2. cricket that point of the ground on which the ball
      pitches or lights when bowled.
      1913 webster

   3. a point or peak; the extreme point or degree of elevation
      or depression; hence, a limit or bound.
      1913 webster

            driven headlong from the pitch of heaven, down
            into this deep.                       --milton.
      1913 webster

            enterprises of great pitch and moment. --shak.
      1913 webster

            to lowest pitch of abject fortune.    --milton.
      1913 webster

            he lived when learning was at its highest pitch.
                                                  --addison.
      1913 webster

            the exact pitch, or limits, where temperance ends.
                                                  --sharp.
      1913 webster

   4. height; stature. obs. --hudibras.
      1913 webster

   5. a descent; a fall; a thrusting down.
      1913 webster

   6. the point where a declivity begins; hence, the declivity
      itself; a descending slope; the degree or rate of descent
      or slope; slant; as, a steep pitch in the road; the pitch
      of a roof.
      1913 webster

   7. mus. the relative acuteness or gravity of a tone,
      determined by the number of vibrations which produce it;
      the place of any tone upon a scale of high and low.
      1913 webster

   note: musical tones with reference to absolute pitch, are
         named after the first seven letters of the alphabet;
         with reference to relative pitch, in a series of tones
         called the scale, they are called one, two, three,
         four, five, six, seven, eight. eight is also one of a
         new scale an octave higher, as one is eight of a scale
         an octave lower.
         1913 webster

   8. mining the limit of ground set to a miner who receives a
      share of the ore taken out.
      1913 webster

   9. mech.
      a the distance from center to center of any two adjacent
          teeth of gearing, measured on the pitch line; --
          called also circular pitch.
      b the length, measured along the axis, of a complete
          turn of the thread of a screw, or of the helical lines
          of the blades of a screw propeller.
      c the distance between the centers of holes, as of rivet
          holes in boiler plates.
          1913 webster

   10. elec. the distance between symmetrically arranged or
       corresponding parts of an armature, measured along a
       line, called the pitch line, drawn around its length.
       sometimes half of this distance is called the pitch.

   concert pitch mus., the standard of pitch used by
      orchestras, as in concerts, etc.

   diametral pitch gearing, the distance which bears the
      same relation to the pitch proper, or circular pitch, that
      the diameter of a circle bears to its circumference; it is
      sometimes described by the number expressing the quotient
      obtained by dividing the number of teeth in a wheel by the
      diameter of its pitch circle in inches; as, 4 pitch, 8
      pitch, etc.

   pitch chain, a chain, as one made of metallic plates,
      adapted for working with a sprocket wheel.

   pitch line, or pitch circle gearing, an ideal line, in
      a toothed gear or rack, bearing such a relation to a
      corresponding line in another gear, with which the former
      works, that the two lines will have a common velocity as
      in rolling contact; it usually cuts the teeth at about the
      middle of their height, and, in a circular gear, is a
      circle concentric with the axis of the gear; the line, or
      circle, on which the pitch of teeth is measured.

   pitch of a roof arch., the inclination or slope of the
      sides expressed by the height in parts of the span; as,
      one half pitch; whole pitch; or by the height in parts of
      the half span, especially among engineers; or by degrees,
      as a pitch of 30deg, of 45deg, etc.; or by the rise
      and run, that is, the ratio of the height to the half
      span; as, a pitch of six rise to ten run. equilateral
      pitch is where the two sloping sides with the span form an
      equilateral triangle.

   pitch of a plane carp., the slant of the cutting iron.

   pitch of poles elec., the distance between a pair of
      poles of opposite sign.

   pitch pipe, a wind instrument used by choristers in
      regulating the pitch of a tune.

   pitch point gearing, the point of contact of the pitch
      lines of two gears, or of a rack and pinion, which work
      together.
      1913 webster
see also:
pitch and toss to play pitch and toss with anything pitch farthing chuck farthing chuck concert pitch 
diametral pitch pitch chain pitch line pitch circle pitch of a roof 
pitch of a plane pitch of poles pitch pipe pitch point 

[2] : The Collaborative International Dictionary of English v.0.48

circle \cir"cle\ s~er"k'l, n. oe. cercle, f. cercle, fr. l.
   circulus whence also as. circul, dim. of circus circle,
   akin to gr. kri`kos, ki`rkos, circle, ring. cf. circus,
   circum-.
   1913 webster
   1. a plane figure, bounded by a single curve line called its
      circumference, every part of which is equally distant from
      a point within it, called the center.
      1913 webster

   2. the line that bounds such a figure; a circumference; a
      ring.
      1913 webster

   3. astron. an instrument of observation, the graduated limb
      of which consists of an entire circle.
      1913 webster

   note: when it is fixed to a wall in an observatory, it is
         called a mural circle; when mounted with a telescope
         on an axis and in y's, in the plane of the meridian, a
         meridian circle or transit circle; when involving
         the principle of reflection, like the sextant, a
         reflecting circle; and when that of repeating an
         angle several times continuously along the graduated
         limb, a repeating circle.
         1913 webster

   4. a round body; a sphere; an orb.
      1913 webster

            it is he that sitteth upon the circle of the earth.
                                                  --is. xi. 22.
      1913 webster

   5. compass; circuit; inclosure.
      1913 webster

            in the circle of this forest.         --shak.
      1913 webster

   6. a company assembled, or conceived to assemble, about a
      central point of interest, or bound by a common tie; a
      class or division of society; a coterie; a set.
      1913 webster

            as his name gradually became known, the circle of
            his acquaintance widened.             --macaulay.
      1913 webster

   7. a circular group of persons; a ring.
      1913 webster

   8. a series ending where it begins, and repeating itself.
      1913 webster

            thus in a circle runs the peasant's pain. --dryden.
      1913 webster

   9. logic a form of argument in which two or more unproved
      statements are used to prove each other; inconclusive
      reasoning.
      1913 webster

            that heavy bodies descend by gravity; and, again,
            that gravity is a quality whereby a heavy body
            descends, is an impertinent circle and teaches
            nothing.                              --glanvill.
      1913 webster

   10. indirect form of words; circumlocution. r.
       1913 webster

             has he given the lie,
             in circle, or oblique, or semicircle. --j.
                                                  fletcher.
       1913 webster

   11. a territorial division or district.
       1913 webster

   note:

   the circles of the holy roman empire, ten in number, were
      those principalities or provinces which had seats in the
      german diet.
      1913 webster

   azimuth circle. see under azimuth.

   circle of altitude astron., a circle parallel to the
      horizon, having its pole in the zenith; an almucantar.

   circle of curvature. see osculating circle of a curve
      below.

   circle of declination. see under declination.

   circle of latitude.
       a astron. a great circle perpendicular to the plane
           of the ecliptic, passing through its poles.
       b spherical projection a small circle of the sphere
           whose plane is perpendicular to the axis.

   circles of longitude, lesser circles parallel to the
      ecliptic, diminishing as they recede from it.

   circle of perpetual apparition, at any given place, the
      boundary of that space around the elevated pole, within
      which the stars never set. its distance from the pole is
      equal to the latitude of the place.

   circle of perpetual occultation, at any given place, the
      boundary of the space around the depressed pole, within
      which the stars never rise.

   circle of the sphere, a circle upon the surface of the
      sphere, called a great circle when its plane passes
      through the center of the sphere; in all other cases, a
      small circle.

   diurnal circle. see under diurnal.

   dress circle, a gallery in a theater, generally the one
      containing the prominent and more expensive seats.

   druidical circles eng. antiq., a popular name for certain
      ancient inclosures formed by rude stones circularly
      arranged, as at stonehenge, near salisbury.

   family circle, a gallery in a theater, usually one
      containing inexpensive seats.

   horary circles dialing, the lines on dials which show the
      hours.

   osculating circle of a curve geom., the circle which
      touches the curve at some point in the curve, and close to
      the point more nearly coincides with the curve than any
      other circle. this circle is used as a measure of the
      curvature of the curve at the point, and hence is called
      circle of curvature.

   pitch circle. see under pitch.

   vertical circle, an azimuth circle.

   voltaic circuit or voltaic circle. see under circuit.
      

   to square the circle. see under square.

   syn: ring; circlet; compass; circuit; inclosure.
        1913 webster
see also:
circus circum- mural circle meridian circle transit circle reflecting circle 
repeating circle the circles of the holy roman empire azimuth circle azimuth circle of altitude 
circle of curvature osculating circle of a curve circle of declination declination circle of latitude 
circles of longitude circle of perpetual apparition circle of perpetual occultation circle of the sphere diurnal circle 
diurnal dress circle druidical circles family circle horary circles 
pitch circle pitch vertical circle voltaic circuit voltaic circle 
circuit to square the circle square 

Pitch Circle >> P Words
Pitch Circle, definition of term: Pitch Circle
pitch+circle_pag1.html

Circle >> C Words
Circle, definition of term: Circle
circle_pag1.html

Pitch >> P Words
Pitch, definition of term: Pitch
pitch_pag1.html

Circle Round >> C Words
Circle Round, definition of term: Circle Round
circle+round_pag1.html

Pitch In >> P Words
Pitch In, definition of term: Pitch In
pitch+in_pag1.html

Vicious Circle >> V Words
Vicious Circle, definition of term: Vicious Circle
vicious+circle_pag1.html

Traffic Circle >> T Words
Traffic Circle, definition of term: Traffic Circle
traffic+circle_pag1.html

Sales Pitch >> S Words
Sales Pitch, definition of term: Sales Pitch
sales+pitch_pag1.html

Great Circle >> G Words
Great Circle, definition of term: Great Circle
great+circle_pag1.html

Concert Pitch >> C Words
Concert Pitch, definition of term: Concert Pitch
concert+pitch_pag1.html

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