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usually uncountable, plural speciations
(taxonomy) The process by which new distinct species evolve. quotations examples
In both groups, however, we find copious and intricate speciation so that, often, species limits are narrow and ill defined.
1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, page 3
No one had ever seen a new species produced, nor, according to Darwin, should they expect to. Speciation was so drawn out as to be, for all intents and purposes unobservable.
2014, Elizabeth Kolbert, The Sixth Extinction: An Unnatural History, Picador, page 55
(chemistry) The formation of different (inorganic) species (especially of ions) as the environment changes. examples
(medicine, pathology) The determination of which species is/are present in a fluid or tissue specimen, bacterial culture, or viral culture.