Rock

Rock definition - medical

Rock (rŏk), John 1890-1984.

American gynecologist and obstetrician who helped develop the first effective oral contraceptive in 1954.

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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