[thigh] n [ME, fr. OE theoh; akin to OHG dioh thigh, Lith taukai, pl., fat] (bef. 12c) 1 a: the proximal segment of the vertebrate hind limb extending from the hip to the knee and supported by a single large bone b: the segment of the leg immediately distal to the thigh in a bird or in a quadruped in which the true thigh is obscured c: the femur of an insect
2: something resembling or covering a thigh -- thighed adj