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Webster 1913 Edition

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Noun.

;

pl.

Prosomata

[NL., fr. Gr. [GREEK] before + [GREEK], [GREEK], body.]

(Zool.)

The anterior of the body of an animal, as of a cephalopod; the thorax of an arthropod.

prosoma ‎(plural prosomas or prosomata)

(zoology) The front segment of a body which is divided into two or more segments, especially the cephalothorax of an arachnid.
- 1996, Michael J. Roberts, Spiders of Britain and Northern Europe, Collins 1996, p. 12:
  The front part, called the cephalothorax (or prosoma), is enclosed within a relatively hard and unyielding chitinous shell.

prosoma m ‎(plural prosomas)