dorsal
1 Americanadjective
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of, relating to, or situated at the back, or dorsum.
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Anatomy, Zoology.
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situated on or toward the upper side of the body, equivalent to the back, or posterior, in humans.
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situated on or toward the posterior plane in humans or toward the upper plane in quadrupeds.
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Botany. pertaining to the surface away from the axis, as of a leaf; abaxial.
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Phonetics. (of a speech sound) articulated with the dorsum of the tongue.
noun
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Phonetics. a dorsal speech sound.
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Anatomy. a dorsal structure.
noun
adjective
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anatomy zoology relating to the back or spinal part of the body Compare ventral
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botany of, relating to, or situated on the side of an organ that is directed away from the axis
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articulated with the back of the tongue, as the (k) sound in English coot
Other Word Forms
Etymology
Origin of dorsal
1535–45; < Medieval Latin dorsālis, equivalent to Latin dors ( um ) back + -ālis -al 1
Explanation
Dorsal is a word taken from anatomy (the study of the body) and refers to things that have to do with one's back. The movie "Jaws" should have been called "Dorsal Fin," because that's almost all you ever see of the famous shark. Like dolphins and sharks, killer whales have prominent dorsal fins on their backs, but it's the ones on their tails you'll want to watch out for. You may have wondered why dogs, cats, and other animals carry their young around by the scruff of their necks. Well, the little one's dorsal sides have extra fat and fur to grab onto. The dorsal side is much harder to damage than the underside (the ventral side) where you'll find their tender tummies and tasty organs.
Vocabulary lists containing dorsal
Animals (Zoology) - Introductory
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Unit 2: Evolution
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Animals (Zoology) - Middle School
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
However, the fossil that led to the discovery of the new species was a recovered dorsal vertebra — a bone from the middle or upper back — which showed distinctive characteristics.
From BBC ● Jul. 10, 2026
The team also tested a more direct method by injecting isolated mitochondria from both humans and mice into the dorsal root ganglia, clusters of nerve cells that send sensory information to the brain.
From Science Daily ● May 24, 2026
With its long eel-like body, gaping mouth and bright red dorsal fins, it’s no surprise that the oarfish calls to mind a sea monster.
From Slate ● Nov. 22, 2024
They primarily rely on their dorsal fin, whereas strong swimmers use their caudal fin or back tail, Paig-Tran said.
From Los Angeles Times ● Nov. 21, 2024
I drew a dorsal fin on top and an anal fin on the bottom, to prevent the shark from rolling side to side when it was moving forward.
From "The Line Tender" by Kate Allen
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
