• WordNet 3.6
    • n subgenus (biology) taxonomic group between a genus and a species
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Webster's Revised Unabridged Dictionary
    • n Subgenus (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.
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Century Dictionary and Cyclopedia
    • n subgenus A subordinate genus; a section or subdivision of a genus higher than a species. Since there is no fixed definition of a genus, there can be none of a subgenus; and thousands of groups in zoology formerly regarded as subgenera, or disregarded entirely, are now named and held to be genera. Though there is theoretically or technically a difference, it is ignored in practice; since a name, whether given as that of a genus or of a subgenus, is a generic name. The case is somewhat different in practice from that of the names of families and subfamilies, whose difference in termination preserves a formal distinction, and from that of the names of all super-generic groups, because none of these enter into the technical binomial designation of a given animal or plant. Thus, the name Lynx may have been given to a subdivision of the genus Felis, and be thus a subgeneric name; but a cat of this kind, as the bay lynx, would be known by the alternative names Felis rufus and Lynx rufus, according to the difference of expert opinion in the case; or, as a compromise, the subgeneric term would be formally introduced in parentheses between the generic and the specific name, as Felis (Lynx) rufus. In botany a subgenus is a section of a genus so strongly marked as to have plausible claims to be itself an independent genus.
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Chambers's Twentieth Century Dictionary
    • n Subgenus sub-jē′nus a primary division of a genus including one or more species with common characters
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In literature:

Subgenus forsan Psoraleae, cui habitu simile, foliis calycibusque pariter glandulosis; diversum dehiscentia insolita antherarum!
"Expedition into Central Australia" by Charles Sturt
An undescribed species of Cancriform epeira, belonging to the subgenus Gasteracantha of M.
"Three Expeditions into the Interior of Eastern Australia, Vol 1 (of 2)" by Thomas Mitchell
Apparently a new subgenus of Phasianus.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
Subgenus: a division within a genus, based upon a character not sufficient for generic separation; opinionative.
"Explanation of Terms Used in Entomology" by John. B. Smith
Cooke says of this subgenus that no British species are known.
"Student's Hand-book of Mushrooms of America, Edible and Poisonous" by Thomas Taylor
Subgenus A. EUSPONGILLA, Vejdovsky (1883).
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
Consequently all are here included in a single subgenus.
"Speciation of the Wandering Shrew" by James S. Findley