The Collaborative International Dictionary
Ancipitous
Ancipital \An*cip"i*tal\, Ancipitous \An*cip"i*tous\, a. [L. anceps, ancipitis, two-headed, double; an- for amb- on both sides + caput head.] (Bot.) Two-edged instead of round; -- said of certain flattened stems, as those of blue grass, and rarely also of leaves.
Wiktionary
ancipitous
a. (alternative form of ancipital English)