[ 'ɛpɪtəʊp ]
■ noun Biochemistry the part of an antigen molecule to which an antibody attaches itself.
Origin
1960s: from epi- + Gk topos 'place'.
EPITOPE
Meaning of EPITOPE in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004