'Equilateral shell' definitions:

Definition of 'Equilateral shell'

From: GCIDE
  • 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]