The Collaborative International Dictionary of English v.0.48:

Terebratula \Ter`e*brat"u*la\, n.; pl. Terebratulae. [Nl.,
   dim. fr. terebratus, p. p., perforated.] (Zool.)
   A genus of brachiopods which includes many living and some
   fossil species. The larger valve has a perforated beak,
   through which projects a short peduncle for attachment.
   Called also lamp shell.
   [1913 Webster]