a biological mother (birth mother) or biological father (birth father); a biological parent.
What Do You Call Your Parents?Mom and Dad? Or Momadukes and Sarge? Check out some of the different names we've found for parental units.
Why Do Parents Use These Babyish Words?When you listen to parents talk to their kids, it may seem like they have their own language. Between ba-ba and uppsie (say what?), parents have a different way of communicating. Let's take a look at the most common words and phrases they use with their children and why.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Medicine definitions for birth parent
A biological parent.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.