zygantrumhttp://www.oed.com/dictionary/zygantrum_n%3Ftab%3Dmeaning_and_usezygantrum, n.
First published 1921; not fully revised

zygantrumnoun

Anatomy and Zoology.
  1. 1854–
    A double cavity on the posterior side of the neural arch of each ordinary vertebra in serpents and some lizards, into which the zygosphene of the next vertebra fits.
    1. 1854
      This wedge [sc. the zygosphene] is received into a cavity (the ‘zygantrum’) excavated in the posterior expansion of the neural arch.
      R. Owen, Structure of Skeleton & Teeth in Orr's Circle of Sciences: Organic Nature vol. I. 197
    2. 1888
      G. Rolleston & W. H. Jackson, Forms of Animal Life (ed. 2) 73.

zygantrum, n. was first published in 1921; not fully revised.

zygantrum, n. was last modified in December 2024.