Hypertext Webster Gateway: "subgenus"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Subgenus \Sub*ge"nus\, n.; pl. {Subgenera}. (Biol.)
A subdivision of a genus, comprising one or more species
which differ from other species of the genus in some
important character or characters; as, the azaleas now
constitute a subgenus of Rhododendron.
From WordNet (r) 1.7 (wn)
subgenus
n : (biology) taxonomic group between a genus and a species
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