mu ‧ tant /ˈmjuːt ə nt/ BrE AmE noun [countable]
[ Date: 1900-2000 ; Language: Latin ; Origin: present participle of mutare ; ⇨ ↑ mutate ]
1 . an animal or plant that is different in some way from others of the same kind, because of a change in its ↑ genetic structure
2 . something that is very different from others of the same type, in a way that is strange or bad – often used humorously
—mutant adjective [only before noun]