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