noun. (biology) a taxonomic group ranking between a phylum and a class.
- taxonomic group
- taxonomic category
Sentences with subphylum
1. Noun, singular or mass
Both frogs and fish belong to the phylum Chordata and the subphylum Vertebrata.
2. Verb, base form
Scorpions are arthropods belonging to subphylum Chelicerata; they have a long appendage with eight legs, two pincers, and one long tail with a stinger on the end.