/lee"euh nuyn'/ , adj.
1. of or pertaining to the lion.
2. resembling or suggestive of a lion.
3. ( usually cap. ) of or pertaining to Leo, esp. Leo IV or Leo XIII.
[ 1350-1400; ME leonyn leoninus lionlike, equiv. to leon- (s. of leo LION) + -inus -INE 1 ]