Dictionary Definition :
Definition[1]
:
A ram's horn is used for 煩惱 the passions and delusions of life.
Source
:
A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous
Definition[2]
:
===(譬喻)即羚羊角。以譬煩惱也。金剛至堅,喻佛性。羚羊角能壞之。即煩惱能壞佛性也。傳心法要下曰:「你若道是有是無,非有非無,總成羊角。羊角者,即你求覓者也。」又云:「設你有者,皆名羊角。」六祖金剛經序曰:「金剛喻佛性,羚羊角喻煩惱。金雖堅剛,羚羊角能碎。佛性雖堅,煩惱能亂。」
Source
:
丁福保《佛學大辭典》