brachiopod

n. marine invertebrate animal that has hinged shells that close in on tentacles

Brachiopods (from Latin bracchium, arm + New Latin -poda, foot) are a nearly extinct, small phylum of benthic invertebrates. Also known as lamp shells (or lampshells), "brachs" or Brachiopoda, they are sessile, two-shelled, marine animals with an external morphology superficially resembling pelecypods (for instance, clams) of phylum Mollusca to which they are not closely related. It is estimated by paleobiologists that 99 percent of all documented lamp-shell species are both fossils and extinct.
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Noun
1. marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide
(synonym) lamp shell, lampshell
(hypernym) invertebrate
(member-holonym) Brachiopoda, phylum Brachiopoda
Adjective
1. of or belonging to the phylum Brachiopoda
(synonym) brachiopodous
(pertainym) Brachiopoda, phylum Brachiopoda

(n.)
One of the Brachiopoda, or its shell.
  

brach