femur's

femur

[fee-mer]
noun, plural femurs, femora [fem-er-uh] .
1.
Anatomy. a bone in the human leg extending from the pelvis to the knee, that is the longest, largest, and strongest in the body; thighbone. See diag. under skeleton.
2.
Zoology. a corresponding bone of the leg or hind limb of an animal.
3.
Entomology. the third segment of the leg of an insect (counting from the base), situated between the trochanter and the tibia.

Origin:
1555–65; < Latin: thigh

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World English Dictionary
femur (ˈfiːmə)
 
n , pl femurs, femora
1.  Nontechnical name: thighbone the longest thickest bone of the human skeleton, articulating with the pelvis above and the knee below
2.  the corresponding bone in other vertebrates
3.  the segment of an insect's leg nearest to the body
 
[C18: from Latin: thigh]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

femur
1563, from L. femur "thigh," borrowed first as an architectural term, 1799 as "thighbone."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

femur fe·mur (fē'mər)
n. pl. fe·murs or fem·o·ra (fěm'ər-ə)

  1. See thigh.

  2. The long bone of the thigh, and the longest and strongest bone in the human body, situated between the pelvis and the knee and articulating with the hipbone and with the tibia and patella. Also called thighbone.

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
femur   (fē'mər)  Pronunciation Key 
The long bone of the thigh or of the upper portion of the hind leg. See more at skeleton.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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