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the anterior part of the body in certain arachnids and crustaceans, consisting of the coalesced head and thorax.
Historical Examples

noun (pl) -raxes, -races (-rəˌsiːz)
the anterior part of many crustaceans and some other arthropods consisting of a united head and thorax

1829, from cephalo- + thorax. Perhaps from French or German.
The combined head and thorax of arachnids, such as spiders, and of many crustaceans, such as crabs.


Read Also:

  • Cephalous

    having a head. a combining form meaning “having a head or heads” of the specified sort or number: brachycephalous. -cephalous suff. Having a specified kind of head or number of heads: nanocephalous.

  • Cephalus

    the husband of Procris. Historical Examples

  • -cephaly

    a combining form of nouns that correspond to adjectives ending in -cephalic, or -cephalous: dolichocephaly. -cephaly suff. A specified condition affecting the head: microcephaly.

  • Cephapirin sodium

    cephapirin sodium ceph·a·pi·rin sodium (sěf’ə-pī’rĭn) n. A semisynthetic broad-spectrum antibiotic derived from cephalosporin, usually administered by injection.

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