1. (botany) any appendage to a plant that is shaped like a strap
The Collaborative International Dictionary of English v.0.48:
Ligule \Lig"ule\ (l[i^]g"[-u]l), n. [L. ligula, lingula, little
tongue, dim of lingua tongue : cf. F. ligule.]
(a) The thin and scarious projection from the upper end of
the sheath of a leaf of grass.
(b) A strap-shaped corolla of flowers of Composit[ae].
2. (Anat.) A band of white matter in the wall of fourth
ventricle of the brain.
WordNet (r) 3.0 (2006):
n 1: (botany) any appendage to a plant that is shaped like a