Webster’s Revised Unabridged Dictionary · 1913
Subkingdom
Sub·king′dom (sŭb·kĭng′dŭm), n. One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoölogy, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Cœlentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia.