The Collaborative International Dictionary
Subvariety \Sub`va*ri"e*ty\, n.; pl. -ties. A subordinate variety, or a division of a variety.
Wiktionary
n. 1 (context botany English) a rank below that of variety. 2 (context math English) a subset of a variety which is itself a variety 3 (context linguistics English) a subordinate language variety
Wikipedia
A subvariety (Latin: subvarietas) in botanical nomenclature is a taxonomic rank. They are rarely used to classify organisms.
Usage examples of "subvariety".
Far from being dead, the field is, artistically at least, richer and wider and more varied than it has ever been, with good work being done by writers in every possible subvariety and subgenre you can nameall out there to be found, in spite of the pressure of competition for bookstore rack space by media tie-in and gaming and other associational novels.
The meter had been built to record one sole subvariety of electrical activity.
And now, since I suggested the Game, I insist that in honor of you, and my brother, but without making it at all mathematical really, we play a subvariety called the Numbers Game.
He divided machines into their genera, subgenera, species, varieties, subvarieties, and so forth.