acephala definition

  • noun-plural:
    • That unit regarding the Mollusca including the bivalve shells, just like the clams and oysters; -- so called since they have no evident head. Formerly the team included the Tunicata, Brachiopoda, and quite often the Bryozoa. See mollusca.
  • others:
    • a phrase introduced by Cuvier into organized zoƶlogy, and applied by him as a class title to a combination of the conchiferous lamellibranchiate mollusks therefore the tunicates.
    • Just Like Acrania.
    • In Latreille's system of category (1795), among seven sales of this Linnean Aptera, containing the spiders, etc., matching on Arachnides palpistes of Lamarck, and synonymous with Arachnida.
    • In Haeckel's category, a group of Mollusca made up of the Spirobranchia, or Brachiopoda, together with Lamellibranchia.

Related Sources

  • Sentence for "acephala"
    • Loose-leaf collards are one of the…
    • View More
78 votes

How would you define acephala?

All the definitions on AZdictionary were written by people just like you. Now's your chance to add your own!