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acrania

(ā-krā′nē-ə, ə-krā′-)
n.
  1. Congenital absence of all or a part of the skull.
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Related formsa•cra′ni•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Examples from the Web for acrania

Historical Examples of acrania

  • Hence we may call it after the Acrania as well as after the Tangles.

    The History of Creation, Vol. II (of 2)

    Ernst Haeckel

  • It is absent as a distinct gland in the Acrania and Cyclostomata.

  • The skull-less animal lancelet, which is still living, affords a faint idea of the members of this group (acrania).

    Was Man Created?

    Henry A. Mott