'Cephalothorax' definitions:

Definition of 'Cephalothorax'

From: GCIDE

Cephalothorax \Ceph`a*lo*tho"rax\, n. [Cephalo- + thorax.] (Zool.) The anterior portion of any one of the Arachnida and higher Crustacea, consisting of the united head and thorax. [1913 Webster]