[en-duh-spawr, -spohr]
Botany, Mycology. the inner coat of a spore. Compare intine.
Bacteriology. a spore formed within a cell of a rod-shaped organism.

1870–75; endo- + spore

endosporous [en-dos-per-uhs, en-doh-spawr-, -spohr-] , adjective
endosporously, adverb
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World English Dictionary
endospore (ˈɛndəʊˌspɔː)
1.  a small asexual spore produced by some bacteria and algae
2.  the innermost wall of a spore or pollen grain

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1875, from endo- + spore.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

endospore en·do·spore (ěn'də-spôr')

  1. A small spore formed within the vegetative cells of some bacteria.

  2. A fungus spore borne within a cell or within the tubular end of a sporophore.

  3. The inner layer of the wall of a spore.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
endospore   (ěn'də-spôr')  Pronunciation Key 
A rounded, inactive form that certain bacteria assume under conditions of extreme temperature, dryness, or lack of food. The bacterium develops a waterproof cell wall that protects it from being dried out or damaged. Bacteria have been known to remain dormant but alive in the form of endospores for long periods of time, even thousands of years. Also called endosporium.
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