equilateral

from WordNet (r) 3.0 (2006)

equilateral
    adj 1: having all sides or faces equal
    n 1: a figure whose sides are all equal

from The Collaborative International Dictionary of English v.0.48

Equilateral \E`qui*lat"er*al\, a. [L. aequilateralis; aequus
   equal + latus, lateris, side: cf. F. ['e]quilat['e]ral.]
   Having all the sides equal; as, an equilateral triangle; an
   equilateral polygon.
   [1913 Webster]

   {Equilateral hyperbola} (Geom.), one whose axes are equal.

   {Equilateral shell} (Zo["o]l.), one in which a transverse
      line drawn through the apex of the umbo bisects the valve,
      or divides it into two equal and symmetrical parts.

   {Mutually equilateral}, applied to two figures, when every
      side of the one has its equal among the sides of the
      other.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Equilateral \E`qui*lat"er*al\, n.
   A side exactly corresponding, or equal, to others; also, a
   figure of equal sides.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

22 Moby Thesaurus words for "equilateral":
      balanced, coequal, coordinate, equal, equiangular, equidimensional,
      equiproportional, equisided, equisized, equispaced, eurythmic,
      even, finished, harmonious, isometric, proportioned, regular,
      symmetric, uniform, well-balanced, well-set, well-set-up