lingula

Lin"gu*la, n.; pl. -læ. Etym: [L., a little tongue.] 1. (Anat.) Defn: A tonguelike process or part. 2. (Zoöl.) Defn: 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.

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