cephalismとは 意味・読み方・使い方

名詞

cephalism (複数形 cephalisms)

1. (biology, obsolete) An instance of the development of a head or head-like structure.
   • 1870, The American Journal of Science and Arts, page 74:

     Thee closer connection off the subdivisions of the annelid is only one of degree; and as to having more organs in common than the Salpa it is rather like the community of interest which the coral cephalisms have in the main trunk.

   • 1878, Henry James Clark, Lucernariæ and Their Allies: A Memoir on the Anatomy and Physiology of Haliclystus Auricula, and Other Lucernarians:

     The medusoid cephalism is persistent, it remains to perform, in addition to its usual functions, a part which is most commonly assigned to the hydroid; thereby illustrating, by a whole order of beings, the theory that not only the hydroid cephalism, but the most highly developed medusoid cephalism, normally, may remain a constant part o what is commonly called a polypidom.