Definition of superclass in English:

superclass

noun

Biology
  • A taxonomic category that ranks above class and below phylum.

    • ‘The superclass Hexapoda includes so-called true insects and several classes of primitive wingless proto-insects.’
    • ‘There are three taxa conventionally included: the Onychophora (velvet worms, which do not posses an exoskeleton, and were previously considered a distinct phylum), and the superclasses Myriapoda and Hexapoda.’

Pronunciation:

superclass

/ˈsuːpəklɑːs/