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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