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1. See specific epithet.
2. Chemistry A common, historic, or convenient name for a substance, derived often from the source in which the substance was discovered, but unsystematic and not used in modern official nomenclature, as sucrose for β-D-fructofuranosyl-α-D-glucopyranoside.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. the species name that follows the genus name in taxonomic classification.
2. the common or unscientific name of an organism or a chemical compound.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.