聾者（ろうしゃ） looks like 龍（たつ・りゅう / dragon）＋耳（みみ / ear）then 者（しゃ/person）

Etymology-wise, it seems the “dragon” part was added just for the pronunciation, not because of dragons.

It means:

“Deaf person”.

That said, 耳の不自由な人（みみのふじゆうなひと / not-free-ear people）・耳が聞こえない人（みみがきこえないひと / ears-can’t-hear people）・聴覚障害者（ちょうかくしょうがいしゃ / hearing disabled people） might be more common terms. Deaf people themselves prefer 聾者 - and I can see why! Who wouldn’t want to be a dragon eared person? I like the character.