plural femurs or femoraˈfe-mə-rə 
ˈfem-rə
1
:the proximal bone of the hind or lower limb that extends from the hip to the knee
called alsothigh bone
2
:the segment of an insect's leg that is third from the body
Examples offemur in a Sentence
Recent Examples on the WebBut the bones –femur, rib, jaw – take her breath away each time.—
Nicole Fallert,USA Today, 4 June 2025Earlier this year, a member of the original U.S. search team who was in Japan in April, retraced the area where Wu-Murad's backpack was found and discovered several other of her personal items and what appeared to be afemur, her family said in a post on social media.—Lucia I Suarez Sang,CBS News, 19 May 2025In another, an older man broke hisfemurand got an infection that could only be treated with IV antibiotics.—Ginny Monk,Hartford Courant, 26 May 2025As a result, by independently moving up and down along with the legs, the two sides of the saddle reportedly transfer pressure from the sit bones to thefemurs, distributing the load more evenly (and less painfully).—New Atlas, 13 Apr. 2025See All Example Sentences forfemur
Examples are automatically compiled from online sources to show current usage.Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.Send us feedback.
Nicole Fallert,USA Today, 4 June 2025Earlier this year, a member of the original U.S. search team who was in Japan in April, retraced the area where Wu-Murad's backpack was found and discovered several other of her personal items and what appeared to be afemur, her family said in a post on social media.—Lucia I Suarez Sang,CBS News, 19 May 2025In another, an older man broke hisfemurand got an infection that could only be treated with IV antibiotics.—Ginny Monk,Hartford Courant, 26 May 2025As a result, by independently moving up and down along with the legs, the two sides of the saddle reportedly transfer pressure from the sit bones to thefemurs, distributing the load more evenly (and less painfully).—New Atlas, 13 Apr. 2025See All Example Sentences forfemurWord History
Etymology
New Latinfemor-, femur, from Latin, thigh
First Known Use
1666, in the meaning defined atsense 1
Browse Nearby Words
Cite this Entry
“Femur.”Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/femur. Accessed 2 Jul. 2025.
Copy CitationKids Definition
femur
nounfe·murˈfē-mər
plural femurs or femoraˈfem-(ə-)rə
1
:the long bone of the hind or lower limb extending from the hip to the knee
called alsothighbone
2
:the segment of an insect's leg that is third from the body
femoraladjective
ˈfem-(ə-)rəl
Medical Definition
femur
nounfe·murˈfē-mər
plural femurs or femoraˈfem-(ə-)rə
1
:the proximal bone of the hind or lower limb that is the longest and largest bone in the human body, extends from the hip to the knee, articulates above with the acetabulum by a rounded head connected with the shaft of the bone by an oblique neck bearing a pair of trochanters for the attachment of muscles, and articulates with the tibia below by a pair of condyles
called alsothigh bone
2
:the segment of an insect's leg that is third from the body
More from Merriam-Webster onfemur
Nglish:Translation offemur for Spanish Speakers
Britannica.com:Encyclopedia article aboutfemur
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