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biceps brachii

[brey-kee-ahy, -kee-ee, brak-ee-ahy, -ee-ee] /ˈbreɪ kiˌaɪ, -kiˌi, ˈbræk iˌaɪ, -iˌi/
See under biceps.
Origin of biceps brachii
1855-60: < New Latin: literally, biceps of (the) arm


[bahy-seps] /ˈbaɪ sɛps/
noun, plural bicepses
[bahy-sep-siz] /ˈbaɪ sɛp sɪz/ (Show IPA),
biceps. Anatomy.
either of two flexor muscles, one (biceps brachii) located in the front of the upper arm and assisting in bending the arm, and the other (biceps femoris) located on the back of the thigh and assisting in bending the leg.
1625-35; < Latin: two-headed, having two parts, equivalent to bi- bi-1 + -ceps (stem -cipit-), combining form of caput head Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for biceps brachii
Historical Examples
  • The triceps brachii is the chief antagonist of the biceps brachii.

    Lameness of the Horse

    John Victor Lacroix
  • This synovial bursa forms a smooth groove through which the biceps brachii glides in the anterior scapulohumeral region.

    Lameness of the Horse

    John Victor Lacroix
  • Thus it is seen, the biceps brachii is a weight bearing structure, as well as one that has to do with swinging the leg.

    Lameness of the Horse

    John Victor Lacroix
  • It is attached anteriorly to the tendon of the biceps brachii (flexor brachii).

    Lameness of the Horse

    John Victor Lacroix
British Dictionary definitions for biceps brachii


noun (pl) -ceps
(anatomy) any muscle having two heads or origins, esp the muscle that flexes the forearm related adjective bicipital
Word Origin
C17: from Latin: having two heads, from bi-1caput head
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for biceps brachii


1630s (adj.), from Latin biceps "having two parts," literally "two-headed," from bis "double" (see bis-) + -ceps comb. form of caput "head" (see capitulum). As a noun meaning "biceps muscle," from 1640s, so called for its structure. Despite the -s, it is singular, and classicists insist there is no such word as bicep.

Online Etymology Dictionary, © 2010 Douglas Harper
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biceps brachii in Medicine

biceps bi·ceps (bī'sěps')
n. pl. biceps or bi·ceps·es (-sěp'sĭz)

  1. A muscle with two heads or points of origin.

  2. The large muscle at the front of the upper arm that flexes the forearm.

  3. The large muscle at the back of the thigh that flexes the knee joint.

bi·cip'i·tal (-sĭp'ĭ-tl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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biceps brachii in Science

Either of two muscles, biceps brachii of the arm or biceps femoris of the leg, each with two points of origin. The biceps of the arm bends the elbow, while the biceps of the leg helps to bend the knee as part of the hamstring.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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