noun, plural quadricepses [kwod-ruh-sep-siz] , quadriceps. Anatomy.
a large muscle in front of the thigh, the action of which extends the leg or bends the hip joint.

1830–40; < Neo-Latin, equivalent to quadri- quadri- + -ceps; see biceps

quadricipital [kwod-ruh-sip-i-tl] , adjective
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World English Dictionary
quadriceps (ˈkwɒdrɪˌsɛps)
n , pl -cepses, -ceps
anatomy a large four-part muscle of the front of the thigh, which extends the leg
[C19: New Latin, from quadri- + -ceps as in biceps]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

quadriceps quad·ri·ceps (kwŏd'rĭ-sěps')
The large four-part extensor muscle at the front of the thigh. adj.
Having four heads, said of certain muscles.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
quadriceps   (kwŏd'rĭ-sěps')  Pronunciation Key 
The large, four-part muscle at the front of the thigh that arises in the hip and pelvis and inserts as a strong tendon below the kneecap (patella). The quadriceps straightens and helps stabilize the knee.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
He grabs my hand and puts it on one of his immense quadriceps.
One randomly selected group stretched their quadriceps, hamstrings and calves for three to five minutes before running.
The quadriceps muscle is an important muscle for running, jumping, and climbing.
Physical therapy, especially quadriceps strengthening and hamstring stretching, may be helpful.
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