having an equal number of parts, markings, etc.
Botany. (of a flower) having the same number of members in each whorl.
Origin of isomerous
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Historical Examples of isomerous
Isomerous, the same number in the successive circles or sets.The Elements of Botany
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