Brachiopod

Brach"i*o*pod

(), n. [Cf.F. brachiopode.] (Zol.) One of the Brachiopoda, or its shell.
[1913 Webster]

Brach`i*op"o*da

(), n. [NL., from Gr. arm + -poda.] (Zol.) A class of Molluscoidea having a symmetrical bivalve shell, often attached by a fleshy peduncle.
[1913 Webster]

Within the shell is a pair of "arms," often long and spirally coiled, bearing rows of ciliated tentacles by which a current of water is made to flow into the mantle cavity, bringing the microscopic food to the mouth between the bases of the arms. The shell is both opened and closed by special muscles. They form two orders; Lyopoma, in which the shell is thin, and without a distinct hinge, as in Lingula; and Arthropoma, in which the firm calcareous shell has a regular hinge, as in Rhynchonella. See Arthropomata.
[1913 Webster]

Brach"i*um

(), n.;
pl. Bracchia ().
[L. brachium or bracchium, arm.] (Anat.) The upper arm; the segment of the fore limb between the shoulder and the elbow.
[1913 Webster]

 

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Sun 16th December 2018