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formatio

(fôr-māshē-ō)
n. pl. for•ma•ti•o•nes (-mā′shē-ōnēz)
  1. A structure of definite shape or cellular arrangement; a formation.
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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 formatio

Historical Examples

  • The formatio reticularis which is feebly developed in the cord becomes well developed in the medulla.

    Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4

    Various