n.
Any of the fluid-filled vesicles in the mammalian ovary containing a maturing ovum.
[After Regnier de Graaf (1641-1673), Dutch physician and anatomist.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.