Plural of femur; the long bones in the thigh connecting the hip to the knee.
From Latin 'femur' meaning thigh. The English plural 'femurs' uses the regular English '-s' ending instead of the Latin 'femora,' reflecting how English borrows and adapts Latin terms.
You have two femurs, and together they're incredibly strong—but they're also a common fracture point for older people whose bones become brittle, and even a simple fall can cause a life-changing hip fracture.
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