femur

noun

fe·​mur ˈfē-mər 

plural femurs or femora ˈfe-mə-rə 

ˈfem-rə

1

: the proximal bone of the hind or lower limb that extends from the hip to the knee

called also thigh bone

2

: the segment of an insect's leg that is third from the body

Examples of femur in a Sentence

Recent Examples on the Web

Museum specimens of moa remains satisfy some of that demand, but DNA degrades significantly over the centuries and what can’t be harvested from private collections has to be dug up in field excavations—with a special eye to long, DNA-rich moa bones like the femur and tibia. —Jeffrey Kluger, Time, 8 July 2025

When Richardson was a sophomore in high school, doctors discovered a hole in the femur in his right knee, according to the Lansing State Journal. —Jason Beede, The Orlando Sentinel, 5 July 2025

Bone loss at the proximal femur, the upper end of the thigh bone that connects to the hip joint, was also observed. —Soo Kim, MSNBC Newsweek, 10 June 2025

Then in January 2023, police discovered a human femur. —David Chiu, People.com, 25 June 2025

Word History

Etymology

New Latin femor-, femur, from Latin, thigh

First Known Use

1666, in the meaning defined at sense 1

Rhymes for femur

• beamer
• creamer
• dreamer
• lemur
• reamer
• schemer
• steamer
• streamer
• redeemer

Kids Definition

femur

noun

fe·​mur ˈfē-mər 

plural femurs or femora ˈfem-(ə-)rə 

1

: the long bone of the hind or lower limb extending from the hip to the knee

called also thighbone

2

: the segment of an insect's leg that is third from the body

femoral

ˈfem-(ə-)rəl

adjective

Medical Definition

femur

noun

fe·​mur ˈfē-mər 

plural femurs or femora ˈfem-(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 also thigh bone

2

: the segment of an insect's leg that is third from the body