noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A thighbone.
2. 2
   the longest and thickest bone of the human skeleton; extends from the pelvis to the knee wordnet
3. 3
   The middle segment of the leg of an insect, between the trochanter and the tibia.
4. 4
   A segment of the leg of an arachnid.

Synonyms

All synonyms

femoristhighbone

Example

More examples

"The human femur is tougher than concrete."

Etymology

Borrowed from Latin femur (“thigh”).

Related phrases

femur fibula ulna syndromefemur head

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.