noun
femur
FEE-muh
noun
1
The thighbone — the long bone running from the hip to the knee.
"She fractured her femur in the skiing accident."
2
In insects, the segment of a leg between the trochanter and the tibia.
"The grasshopper's powerful jump comes from muscles in its femur."
How to Use Femur
Learner’s notesIn plain EnglishThe thighbone in humans, or the equivalent leg segment in insects.
Word Forms
femurs plural, femora plural
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She fractured her _____ in the skiing accident.
Etymology
Borrowed directly from Latin femur ("thigh").