a doctor who administers agents that cause loss of sensation during surgery anasthesiologist a doctor specializes in treatment of disease using high-energy radiation
The word phylum (plural: phyla) is a category used to classify marine organisms. In this article, you can learn the definition of phylum, how it is used, and examples of phyla used to categorize marine life.
Full Definition of PHYLUM. 1. a: a direct line of descent within a group b: a group that constitutes or has the unity of a phylum; specifically: a primary category in biological taxonomy especially of animals that ranks above the class and below the kingdom â compare division 10.