Definify.com
Webster 1913 Edition
Subkingdom
Sub-king′dom
,Noun.
One of the several primary divisions of either the animal, or vegetable kingdom, as, in Zoology, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Coelentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia.