Subclass

['sʌbklɑːs] or ['sʌbklæs]

(noun.) (biology) a taxonomic category below a class and above an order.

Checked by Clive--From WordNet

(n.) One of the natural groups, more important than an order, into which some classes are divided; as, the angiospermous subclass of exogens.

Checker: Tom

n. a primary subdivision of a class.

Typed by Lloyd