intercrural (adj.)youdaoicibaDictYouDict
"between the thighs," or in madicine, "between leg-like structures," 1690s, from inter- + Latin crus "shin, shinbone leg; supports of a bridge."
cruralyoudaoicibaDictYouDict
"Relating to the leg or the thigh", Late 16th century: from Latin cruralis, from crus, crur- 'leg'.