Subkingdom

n.

1.

One of the several primary divisions of either the animal, or vegetable kingdom, as, in Zoology, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Cœlentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia.

Noun

1.

subkingdom - (biology) a taxonomic group comprising a major division of a kingdom

biological science, biology, Metazoa, Parazoa, subkingdom Metazoa, subkingdom Parazoa, taxon, taxonomic category, taxonomic group