Definition from Wiktionary, the free dictionary
ligule (plural ligules)
- A strap-shaped structure.
- (botany) A portion of a leaf found at the base of the petiole, when present.
- (botany) In many grasses (Poaceae) and some sedges (Cyperaceae), the membranous appendage or ring of hairs projecting from the inner side of a leaf at the junction between the blade and the sheath.