thighbone thigh • thighed · · · Info · Definitions · Synonyms · Characters · · thighbone · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the longest and thickest bone of the human skeleton; extends from the pelvis to the knee. Synonyms: femur, femoris. · · Noun Definition 1 Synonyms · · · femur · · Synonym 1 femoris · · Synonym 2 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074