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

spherical \spher"ical\, spheric \spher"ic\, a. l. sphaericus,
   gr. ???: cf. f. sph'erique.
   1. having the form of a sphere; like a sphere; globular;
      orbicular; as, a spherical body.
      1913 webster

   2. of or pertaining to a sphere.
      1913 webster

   3. of or pertaining to the heavenly orbs, or to the sphere or
      spheres in which, according to ancient astronomy and
      astrology, they were set.
      1913 webster

            knaves, thieves, and treachers by spherical
            predominance.                         --shak.
      1913 webster

            though the stars were suns, and overburned
            their spheric limitations.            --mrs.
                                                  browning.
      1913 webster

   spherical angle, spherical coordinate, spherical
   excess, etc. see under angle, coordinate, etc.

   spherical geometry, that branch of geometry which treats of
      spherical magnitudes; the doctrine of the sphere,
      especially of the circles described on its surface.

   spherical harmonic analysis. see under harmonic, a.

   spherical lune,portion of the surface of a sphere included
      between two great semicircles having a common diameter.

   spherical opening, the magnitude of a solid angle. it is
      measured by the portion within the solid angle of the
      surface of any sphere whose center is the angular point.
      

   spherical polygon,portion of the surface of a sphere
      bounded by the arcs of three or more great circles.

   spherical projection, the projection of the circles of the
      sphere upon a plane. see projection.

   spherical sector. see under sector.

   spherical segment, the segment of a sphere. see under
      segment.

   spherical triangle,re on the surface of a sphere, bounded
      by the arcs of three great circles which intersect each
      other.

   spherical trigonometry. see trigonometry.
      1913 webster -- spher"ically, adv. --
      spher"icalness, n.
      1913 webster
see also:
spherical angle spherical coordinate spherical excess angle coordinate spherical geometry 
spherical harmonic analysis harmonic spherical lune spherical opening spherical polygon 
spherical projection projection spherical sector sector spherical segment 
segment spherical triangle spherical trigonometry trigonometry spher"ically 
spher"icalness 

[2] : WordNet (r) 2.0

spherical triangle
     n : a spherical polygon formed by the arcs of 3 great circles

Triangle >> T Words
Triangle, definition of term: Triangle
triangle_pag1.html

Spherical >> S Words
Spherical, definition of term: Spherical
spherical_pag1.html

Spherical Secto >> S Words
Spherical Secto, definition of term: Spherical Secto
spherical+secto_pag1.html

Spherical Coord >> S Words
Spherical Coord, definition of term: Spherical Coord
spherical+coord_pag1.html

Obtuse Triangle >> O Words
Obtuse Triangle, definition of term: Obtuse Triangle
obtuse+triangle_pag1.html

Acute Triangle >> A Words
Acute Triangle, definition of term: Acute Triangle
acute+triangle_pag1.html

Right Triangle >> R Words
Right Triangle, definition of term: Right Triangle
right+triangle_pag1.html