noun, plural prosomas, prosomata [proh-soh-muh-tuh] . Zoology.
an anterior body region, especially the arthropod cephalothorax.

1870–75; < Neo-Latin; see pro-2, -soma

prosomal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
prosoma (prəʊˈsəʊmə)
n , pl -mas, -mata
zoology the head and thorax of an arachnid

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
There is a pair of compound eyes dorso-laterally on the prosoma.
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