subclass

• POS: Noun, Verb (transitive)
• HYPHEN: sub=class

CIDE DICTIONARY

subclass, n. 

 One of the natural groups, more important than an order, into which some classes are divided; as, the angiospermous subclass of exogens.  [1913 Webster]

OXFORD DICTIONARY

subclass, n.
1 a secondary or subordinate class.
2 Biol. a taxonomic category below a class.

THESAURUS

subclass

biotype, branch, class, family, genotype, genus, kingdom, order, phylum, section, series, species, subfamily, subgenus, subkingdom, suborder, subspecies, subtribe, superclass, superfamily, superorder, superspecies, tribe, variety