oxybarbiturate

[ŏk′sē-bär-bĭchər-ĭt, -ə-rāt′, -bär′bĭ-turĭt, -āt′]

n.

Any of various barbiturates that act as hypnotics and contain an oxygen atom.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.