n. The process by which new distinct species evolve.
n. The formation of different (inorganic) species, for example in a gas.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the evolution of a biological species
Word Usage
"The actual moment when a "daughter" species can (or will) no longer cross-breed with the population from which it sprang (the definition of speciation) is almost impossible to pinpoint, let alone to witness."