phylum

phylum definition - medical

phy·lum (fīˈləm)

noun pl. phy·la (-lə)
A taxonomic category that is a primary division of a kingdom and ranks above a class in size.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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