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exosporium

American  
[ek-soh-spawr-ee-uhm, -spohr-] / ˌɛk soʊˈspɔr i əm, -ˈspoʊr- /

noun

plural

exosporia

  1. exine.

Example Sentences

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It has been suggested, and apparently on good grounds, that the spore membrane consists of two layers, the exosporium and the endosporium.

From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by Eyre, J. W. H. (John William Henry)

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.