| 释义 |
‖ prosoma Zool.|prəʊˈsəʊmə|
Also in anglicized form prosome |ˈprəʊsəʊm|.
[mod.L., f. Gr. πρό, pro-2 + σῶµα body.]
The anterior or cephalic segment of the body in certain animals, as cephalopods, lamellibranchs, and cirripeds.
1872Nicholson Palæont. 272 The body in the Cephalopoda is symmetrical..there is a tolerably distinct separation..into an anterior cephalic portion (prosoma) and a posterior portion, enveloped in the mantle..(metasoma). 1877Huxley Anat. Inv. Anim. vi. 293 The thoracic segments, which succeed the prosoma, gradually taper posteriorly.
Hence proˈsomal, prosoˈmatic adjs., belonging to the prosoma or anterior part of the body.
1890Cent. Dict., Prosomal, Prosomatic. 1895in Syd. Soc. Lex. 1900W. H. Gaskell in Jrnl. Anat. & Physiol. July 465 The Prosomatic Appendages of the Merostomata. Ibid. 471 The metastoma represented the fused last pair of prosomatic appendages, and so formed a ventral lip to a prosomatic or oral chamber. |