鬣 is a bound morpheme (b.f.) meaning 'mane' or 'ruff', and it cannot stand alone as an independent word. You'll encounter it mainly in compound nouns such as 鬣狗 (liègǒu, 'hyena', literally 'maned dog') and 鬣蜥 (lièxī, 'iguana'). As a bound form, it always attaches to another morpheme and has no modern standalone usage.