alternation of generations al·ter·na·tionofgenerations uncommon noun 1. the alternation of two or more different forms in the life cycle of a plant or animal Synonymsalternation of generationsheterogenesisxenogenesis Related words Broader terms organic phenomenon Narrower terms metagenesis WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
