cruralPronunciation: /ˈkrʊər(ə)l/Definition of crural adjective Anatomy & Zoology relating to the leg or the thigh. relating to any part called ‘crus’, for example, the crura cerebri. Origin: late 16th century: from Latin cruralis, from crus, crur- 'leg'crural in other Oxford dictionaries Definition of crural in the US English dictionary