What's the noun for thigh? Here's the word you're looking for.
thigh
The upper leg of a human, between the hip and the knee. [from 8th c.]
That part of the leg of vertebrates (or sometimes other animals) which corresponds to the human thigh in position or function; the tibia of a horse, the tarsus of a bird; the third leg-section of an insect. [from 14th c.]