: a median line
especially
: the median line or median plane of the body or some part of the body
Examples of midline in a Sentence
Recent Examples on the Web
The team identified a continuous midline feature that began as a fleshy crest along the neck and trunk and transitioned over the hips into a single row of spikes running down the tail — each spike positioned over a single vertebra and fitted to each other.
—
Abhishek Bhardwaj, Interesting Engineering, 24 Oct. 2025
The fossils showed Edmontosaurus boasted a continuous midline feature on its body, with a fleshy crest along the neck and trunk that changes over the hips into a single row of spikes running down the tail.
—Reuters, NBC news, 24 Oct. 2025
While their primary job is adduction, pulling your legs toward the midline of your body — think squeezing your knees together — their overall function is far more expansive.
—Dana Santas, CNN Money, 26 Sep. 2025
China has, in recent years, been ratcheting up pressure on Taiwan through near-daily sorties across the midline of the strait and large-scale military exercises aiming to punish the Beijing-skeptic Democratic Progressive Party government in Taipei.
—Micah McCartney, MSNBC Newsweek, 8 Sep. 2025
See All Example Sentences for midline
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Abhishek Bhardwaj, Interesting Engineering, 24 Oct. 2025
The fossils showed Edmontosaurus boasted a continuous midline feature on its body, with a fleshy crest along the neck and trunk that changes over the hips into a single row of spikes running down the tail.
—Reuters, NBC news, 24 Oct. 2025
While their primary job is adduction, pulling your legs toward the midline of your body — think squeezing your knees together — their overall function is far more expansive.
—Dana Santas, CNN Money, 26 Sep. 2025
China has, in recent years, been ratcheting up pressure on Taiwan through near-daily sorties across the midline of the strait and large-scale military exercises aiming to punish the Beijing-skeptic Democratic Progressive Party government in Taipei.
—Micah McCartney, MSNBC Newsweek, 8 Sep. 2025
See All Example Sentences for midline
Cite this Entry
“Midline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/midline. Accessed 3 Nov. 2025.
Copy CitationKids Definition
midline
noun
mid·line
ˈmid-ˌlīn 
: a line through the middle of something
especially
: a line through a body or one of its parts that lies in a plane dividing it into halves that are mirror images of each other
Medical Definition
midline
noun
mid·line
ˈmid-ˌlīn, ˌmid-ˈlīn
: a median line
especially
: the median line or median plane of the body or some part of the body
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