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

optic \op"tic\ o^p"ti^k, optical \op"tical\
   o^p"ti^kal, a. f. optique, gr. 'optiko`s; akin to
   'o`psis sight, 'o`pwpa i have seen, 'o`psomai i shall see,
   and to 'o`sse the two eyes, 'o`ps face, l. oculus eye. see
   ocular, eye, and cf. canopy, ophthalmia.
   1. of, pertaining to, or using vision or sight; as, optical
      illusions. wordnet sense 2

   syn: ocular, optic, visual.
        1913 webster + wordnet 1.5

              the moon, whose orb
              through optic glass the tuscan artist views.
                                                  --milton.
        1913 webster

   2. of or pertaining to the eye; ocular; as, the optic nerves
      the first pair of cranial nerves which are distributed
      to the retina; the optic or optical axis of the eye. see
      illust. of brain, and eye. wordnet sense 3
      1913 webster

   3. relating to the science of optics or to devices designed
      to assist vision; as, optical works; optical equipment.
      wordnet sense 1
      1913 webster +pjc

   optic angle opt., the angle included between the optic
      axes of the two eyes when directed to the same point; --
      sometimes called binocular parallax.

   optic axis. opt.
      a a line drawn through the center of the eye
          perpendicular to its anterior and posterior surfaces.
          in a normal eye it is in the direction of the optic
          axis that objects are most distinctly seen.
      b the line in a doubly refracting crystal, in the
          direction of which no double refraction occurs. a
          uniaxial crystal has one such line, a biaxial crystal
          has two.

   optical circle opt., a graduated circle used for the
      measurement of angles in optical experiments.

   optical square, a surveyor's instrument with reflectors for
      laying off right angles.
      1913 webster
see also:
ocular eye canopy ophthalmia brain optic angle 
binocular parallax optic axis optical circle optical square 

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

angle \an"gle\ a^ng"g'l, n. f. angle, l. angulus angle,
   corner; akin to uncus hook, gr. 'agky`los bent, crooked,
   angular, 'a`gkos a bend or hollow, as. angel hook, fish-hook,
   g. angel, and f. anchor.
   1. the inclosed space near the point where two lines meet; a
      corner; a nook.
      1913 webster

            into the utmost angle of the world.   --spenser.
      1913 webster

            to search the tenderest angles of the heart.
                                                  --milton.
      1913 webster

   2. geom.
      a the figure made by. two lines which meet.
      b the difference of direction of two lines. in the lines
          meet, the point of meeting is the vertex of the angle.
          1913 webster

   3. a projecting or sharp corner; an angular fragment.
      1913 webster

            though but an angle reached him of the stone.
                                                  --dryden.
      1913 webster

   4. astrol. a name given to four of the twelve astrological
      "houses." obs. --chaucer.
      1913 webster

   5. as. angel. a fishhook; tackle for catching fish,
      consisting of a line, hook, and bait, with or without a
      rod.
      1913 webster

            give me mine angle: we 'll to the river there.
                                                  --shak.
      1913 webster

            a fisher next his trembling angle bears. --pope.
      1913 webster

   acute angle, one less than a right angle, or less than
      90deg.

   adjacent or contiguous angles, such as have one leg
      common to both angles.

   alternate angles. see alternate.

   angle bar.
      a carp. an upright bar at the angle where two faces of
          a polygonal or bay window meet. --knight.
      b mach. same as angle iron.

   angle bead arch., a bead worked on or fixed to the angle
      of any architectural work, esp. for protecting an angle of
      a wall.

   angle brace, angle tie carp., a brace across an
      interior angle of a wooden frame, forming the hypothenuse
      and securing the two side pieces together. --knight.

   angle iron mach., a rolled bar or plate of iron having
      one or more angles, used for forming the corners, or
      connecting or sustaining the sides of an iron structure to
      which it is riveted.

   angle leaf arch., a detail in the form of a leaf, more or
      less conventionalized, used to decorate and sometimes to
      strengthen an angle.

   angle meter, an instrument for measuring angles, esp. for
      ascertaining the dip of strata.

   angle shaft arch., an enriched angle bead, often having a
      capital or base, or both.

   curvilineal angle, one formed by two curved lines.

   external angles, angles formed by the sides of any
      right-lined figure, when the sides are produced or
      lengthened.

   facial angle. see under facial.

   internal angles, those which are within any right-lined
      figure.

   mixtilineal angle, one formed by a right line with a curved
      line.

   oblique angle, one acute or obtuse, in opposition to a
      right angle.

   obtuse angle, one greater than a right angle, or more than
      90deg.

   optic angle. see under optic.

   rectilineal or right-lined angle, one formed by two right
      lines.

   right angle, one formed by a right line falling on another
      perpendicularly, or an angle of 90deg measured by a
      quarter circle.

   solid angle, the figure formed by the meeting of three or
      more plane angles at one point.

   spherical angle, one made by the meeting of two arcs of
      great circles, which mutually cut one another on the
      surface of a globe or sphere.

   visual angle, the angle formed by two rays of light, or two
      straight lines drawn from the extreme points of an object
      to the center of the eye.

   for angles of commutation, draught, incidence,
   reflection, refraction, position, repose, fraction,
      see commutation, draught, incidence, reflection,
      refraction, etc.
      1913 webster
see also:
acute angle adjacent contiguous angles alternate angles alternate angle bar 
angle iron angle bead angle brace angle tie angle leaf 
angle meter angle shaft curvilineal angle external angles facial angle 
facial internal angles mixtilineal angle oblique angle obtuse angle 
optic angle optic rectilineal right-lined angle right angle 
solid angle spherical angle visual angle for angles of commutation draught 
incidence reflection refraction position repose 
fraction commutation draught incidence reflection 
refraction 

Angle >> A Words
Angle, definition of term: Angle
angle_pag1.html

Angle Bracket >> A Words
Angle Bracket, definition of term: Angle Bracket
angle+bracket_pag1.html

Angle Iron >> A Words
Angle Iron, definition of term: Angle Iron
angle+iron_pag1.html

Acute Angle >> A Words
Acute Angle, definition of term: Acute Angle
acute+angle_pag1.html

Dihedral Angle >> D Words
Dihedral Angle, definition of term: Dihedral Angle
dihedral+angle_pag1.html

Angle Of Attack >> A Words
Angle Of Attack, definition of term: Angle Of Attack
angle+of+attack_pag1.html

Angle Of Repose >> A Words
Angle Of Repose, definition of term: Angle Of Repose
angle+of+repose_pag1.html