[ mid-lahyn ]
/ ˈmɪdˌlaɪn /


Zoology. the median plane of the body of an animal.
Geometry. midsegment.

Origin of midline

First recorded in 1865–70; mid- + line1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for midline

Medicine definitions for midline


[ mĭdlīn′ ]


A medial line, especially the medial line or plane of the body.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.