from The Century Dictionary.
- noun A substance, solid or fluid, in which bacteria or other microscopic organisms are cultivated.
Sorry, no etymologies found.
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Each bacterium capable of growth gives rise to a colony visible to the naked eye, and if the colonies are sufficiently apart, an inoculation can be made from any one to a tube of culture-medium and a pure culture obtained.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy"
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