subkingdom Meaning, Definition & Usage
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noun (biology) a taxonomic group comprising a major division of a kingdom
WordNet
Sub*king"dom noun
Definitions
One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoölogy, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Coelentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia.