mammary ridge


n.

A bandlike thickening of ectoderm in the embryo extending from just below the axilla to the inguinal region and giving rise to the mammary glands.mammary fold milk line

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What does “vacillate” mean?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.