The inner layer or innermost structure of an endospore; the spore wall or membrane that surrounds the spore's contents.
From endo- (within) + sporium (spore structure), using Latin neuter singular. Botanical and mycological term that became standard in the 1800s as cell structure research advanced.
The endosporium is like a cell's ultimate fortress wall—so tough that some bacteria can survive 12 years in this dormant form without any food or water!
Complete word intelligence in one call. Free tier — 50 lookups/day.