quaternary

quaternary definition - medical

qua·ter·nar·y (kwŏtˈər-nĕrˌē, kwə-tûrˈnə-rē)

adjective
  1. Consisting of four; in fours.
  2. Relating to an atom bonded to four carbon atoms.
noun
The member of a group or series that is fourth in order.

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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