‖Lin″gu‐la (lĭṉ″gū̍‐lȧ), n.; pl.-læ (–lē). 1. (Anat.) A tonguelike process or part.
2. (Zoöl.) 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.