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Definition of: endospore
(en′dō·spôr, -spōr) noun Bot.
1. A spore formed within the membrane of a cell.
2. The delicate inner layer of the wall of a spore: also en′do·spo′ri·um.
3. An asexual spore produced by certain bacteria: opposed to arthrospore.
—en·dos·po·rous (en·dos′pər·əs) adjective
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