LINGULAE

Noun

lingulae

plural of lingula

Source: Wiktionary

LINGULA

Lin"gu*la, n.; pl. -læ. Etym: [L., a little tongue.]

1. (Anat.)

Definition: A tonguelike process or part.

2. (Zoöl.)

Definition: Any one of numerous species of brachiopod shells belonging to the genus Lingula, and related genera. See Brachiopoda, and Illustration in Appendix. Lingula flags (Geol.), a group of strata in the lower Silurian or Cambrian system of Wales, in which some of the layers contain vast numbers of a species of Lingula.

Source: Webster’s Unabridged Dictionary 1913 Edition