acetylcholinesterase
Concise Oxford English Dictionary © 2008 Oxford University Press:
acetylcholinesterase /ˌasɪtʌɪlˌkəʊlɪnˈɛstəreɪz, -tɪl-/
▶noun Biochemistry an enzyme that breaks down acetylcholine, stopping excitation of a nerve after transmission of an impulse.
'acetylcholinesterase' also found in these Oxford entries:

