Arthrostraca

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Arthrostraca \Ar*thros"tra*ca\, n. pl. [NL., fr. Gr. 'a`rqron
     joint + ? a shell.] (Zool.)
     One of the larger divisions of Crustacea, so called because
     the thorax and abdomen are both segmented; Tetradecapoda. It
     includes the Amphipoda and Isopoda.
     [1913 Webster]