A rule used as a means of estimating date of delivery by counting back three months from the first day of the last menstrual period and adding seven days.
Rule 63Read more in this article about some frequently asked questions and fun facts related to our definitions.
Rule 34Read more in this article about some frequently asked questions and fun facts related to our definitions.
- naphthol yellow s,
- naphthyl group,
- napier grass
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.