polyiamond

(redirected from Pentiamond)

polyiamond

[′päl·ē·ə‚mänd]
(mathematics)
A plane figure formed by joining a finite number of equilateral triangles along their sides.
References in periodicals archive ?
Find all the mathematically distinct polyiamonds up to six triangles at a time: moniamonds, diamonds, triamonds, tetriamonds, pentiamonds, and hexiamonds.