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]

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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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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
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