equicrural

from The Collaborative International Dictionary of English v.0.48

Equicrural \E`qui*cru"ral\, a. [L. aequicrurius; aequus equal +
   crus, cruris, leg.]
   Having equal legs or sides; isosceles. [R.] "Equicrural
   triangles." --Sir T. Browne.
   [1913 Webster]