- an artificial taxonomic category including species, especially of fossil forms, grouped together on the basis of morphological resemblance.
Origin of form genus
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a group of species (form species) that have similar structural characteristics but are not closely related
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012