Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The anterior section of arachnids and many crustaceans, consisting of the fused head and thorax.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The fused head and thorax of spiders and crustaceans.

from the GNU version of the Collaborative International Dictionary of English

  • n. The anterior portion of any one of the Arachnida and higher Crustacea, consisting of the united head and thorax.

from The Century Dictionary and Cyclopedia

  • n. The anterior division of the body in arthropods, as crustaceans, spiders, scorpions, etc., consisting of the head and thorax blended together.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the New Latin cephal, from Ancient Greek κεφαλή (kephalē, "head") + thorax.

Examples

  • It has an abdomen and what we call a cephalothorax, which is kind of a fusion of the head and the thorax region.

    Why The Tea Party Is Like A Starfish, Not A Spider

  • Instead the terms cephalothorax or prosoma are widely used.}: that portion of an obtect pupa covering head and thorax: the anterior segments of larva that have no obviously separated head.

    Explanation of Terms Used in Entomology

  • Then they have a sternum which is located on the bottom of the cephalothorax, which is the flat structure that is surrounded by the legs.

    CreationWiki - Recent changes [en]

  • Then they have a sternum which is located on the bottum of the cephalothorax, which is the flat structure that is surrounded by the leggs.

    CreationWiki - Recent changes [en]

  • The body of isopods is divided into three sections; the cephalothorax, the thorax and the abdomen.

    Crustacea

  • The next five pairs of appendages on the cephalothorax are used in food handling, while the last five pairs of appendages are the walking legs.

    Crustacea

  • As with many crustaceans, the first thoracic segment is fused with the head to form the cephalothorax in mysids.

    Crustacea

  • The body is divided into three parts; the cephalothorax, the thorax, and the abdomen.

    Crustacea

  • The cephalothorax has a pair of stalked eyes and 12 pairs of appendages.

    Crustacea

  • All of these groups share a similar body architecture, being divided into an anterior prosoma (the cephalothorax) and a posterior opisthosoma (abdomen).

    Arthropoda

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