Try Our Apps


Avoid these words. Seriously.


[en-duh-spawr, -spohr] /ˈɛn dəˌspɔr, -ˌspoʊr/
Botany, Mycology. the inner coat of a spore.
Compare intine.
Bacteriology. a spore formed within a cell of a rod-shaped organism.
Origin of endospore
First recorded in 1870-75; endo- + spore
Related forms
[en-dos-per-uh s, en-doh-spawr-, -spohr-] /ɛnˈdɒs pər əs, ˌɛn doʊˈspɔr-, -ˈspoʊr-/ (Show IPA),
endosporously, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for endospore
Historical Examples
  • When the spore is coloured, the external membrane alone appears to possess colour, the endospore being constantly hyaline.

    Fungi: Their Nature and Uses Mordecai Cubitt Cooke
British Dictionary definitions for endospore


a small asexual spore produced by some bacteria and algae
the innermost wall of a spore or pollen grain
Derived Forms
endosporous (ɛnˈdɒspərəs; ˌɛndəʊˈspɔːrəs) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for endospore

1859, perhaps from French, from endo- + spore.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
endospore in Medicine

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.
Cite This Source
endospore in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for endospore

Difficulty index for endospore

Few English speakers likely know this word

Word Value for endospore

Scrabble Words With Friends