Acanthodian



any small, spiny-finned, sharklike fish of the extinct order Acanthodii, from the Paleozoic Era.
Historical Examples

There is no evidence that the lateral row of spines in the acanthodian Climatius has any other than a defensive significance.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 3 Various

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  • Acanthoid

    spiny; spinous. adjective resembling a spine; spiny acanthoid a·can·thoid (ə-kān’thoid’) adj. Shaped like a thorn or spine.

  • Acanthology

    the study of spines, as in sea urchins or certain spiny-headed worms, particularly as they relate to taxonomic classification. noun the scientific study of spines Word Origin Greek ‘thorn’



  • Acantholysis

    acantholysis acantholysis ac·an·thol·y·sis (āk’ān-thŏl’ĭ-sĭs, āk’ən-) n. pl. ac·an·thol·y·ses (-sēz’) Separation of individual prickle cells from their neighbors, as in keratosis follicularis.

  • Acanthoma

    acanthoma acanthoma ac·an·tho·ma (āk’ān-thō’mə, āk’ən-) n. pl. ac·an·tho·mas or ac·an·tho·ma·ta (-mə-tə) A tumor composed of epidermal squamous cells.



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