
• (n.) The anterior of the body of an animal, as of a cephalopod; the thorax of an arthropod.
Found on
http://thinkexist.com/dictionary/meaning/prosoma/

<zoology> The anterior of the body of an animal, as of a cephalopod; the thorax of an arthropod. ... (06 Mar 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

Anterior tagma of arachnids, consisting of cephalothorax; fused imperceptibly to opisthosoma in Acari.
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http://www.encyclo.co.uk/visitor-contributions.php
Pro·so'ma noun ;
plural Prosomata . [ New Latin , from Greek ... before + ..., ..., body.]
(Zoology) The anterior of the body of an animal, as of a cephalopod; the thorax of an arthropod.
Found on
http://www.encyclo.co.uk/webster/P/178

also called cephalothorax, it is the front body section of an arachnid, a combination of head and thorax
Found on
http://www.museum.state.il.us/ismdepts/zoology/spiders/spiders_glossary.htm

Cephalothorax - the anterior most of the two body sections of an arachnid.
Found on
https://www.amentsoc.org/insects/glossary/begins/with/p/

the anterior of the two main body regions of a scorpion, serving as a combined head and thorax. The prosoma bears the carapace dorsally and the coxosternal region ventrally; the chelicerae, pedipalps, and four pairs of legs are associated with the prosoma.
Found on
https://www.encyclo.co.uk/local/21266

an anterior body region, esp. the arthropod cephalothorax.
Found on
https://www.infoplease.com/dictionary/prosoma
No exact match found.