prosoman.

Brit.

/prəʊˈsəʊmə/, U.S.

/proʊˈsoʊmə/

Inflections: Plural prosomata.

Origin: A borrowing from Greek, combined with an English element. Etymons: pro- prefix², Greek σῶμα.

Etymology: < pro- prefix² + ancient Greek σῶμα body (see soma n.²).

Zoology.

The anterior or cephalic region of the body in various invertebrates having a body divided into two or three distinct sections (e.g. cephalopod molluscs, cirripedes, etc.); esp. the cephalothorax of an arachnid. Cf. metasoma n., opisthosoma n. Cf. also prosome n.¹

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [noun] > anterior segment

prosoma1853

prosome1890

protosome1959

1853 C. Darwin Let. 12 Feb. in Corr. (1989) V. 115 The thoracic segment supporting this cirrus is confluent with mouth & forms the prosoma in normal manner.

1872 H. A. Nicholson Man. Palæontol. 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).

1902 Encycl. Brit. XXV. 695/1 The five pairs of appendages of the post-oral somites of the head or prosoma thus constituted all primitively carry gnathobasic projections on their coxal joints.

1957 Jrnl. Paleontol. 31 597/2 Two prosomata exhibiting characteristics of this genus [sc. Euproops] have been collected from beds of the Windsor group.

1995 Independent 3 Oct. (Suppl.) 15/4 In spiders, the head and thorax are continuous, forming something called the prosoma. Eight legs are attached to the prosoma and their abdomen is joined to it at the lower end.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	prosoma
释义	prosoman. Brit. /prəʊˈsəʊmə/, U.S. /proʊˈsoʊmə/ Inflections: Plural prosomata. Origin: A borrowing from Greek, combined with an English element. Etymons: pro- prefix², Greek σῶμα. Etymology: < pro- prefix² + ancient Greek σῶμα body (see soma n.²). Zoology. The anterior or cephalic region of the body in various invertebrates having a body divided into two or three distinct sections (e.g. cephalopod molluscs, cirripedes, etc.); esp. the cephalothorax of an arachnid. Cf. metasoma n., opisthosoma n. Cf. also prosome n.¹ ΘΚΠ the world > animals > invertebrates > bodies or parts > [noun] > anterior segment prosoma1853 prosome1890 protosome1959 1853 C. Darwin Let. 12 Feb. in Corr. (1989) V. 115 The thoracic segment supporting this cirrus is confluent with mouth & forms the prosoma in normal manner. 1872 H. A. Nicholson Man. Palæontol. 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). 1902 Encycl. Brit. XXV. 695/1 The five pairs of appendages of the post-oral somites of the head or prosoma thus constituted all primitively carry gnathobasic projections on their coxal joints. 1957 Jrnl. Paleontol. 31 597/2 Two prosomata exhibiting characteristics of this genus [sc. Euproops] have been collected from beds of the Windsor group. 1995 Independent 3 Oct. (Suppl.) 15/4 In spiders, the head and thorax are continuous, forming something called the prosoma. Eight legs are attached to the prosoma and their abdomen is joined to it at the lower end. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1853
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