POLYCYCLIC Meaning of POLYCYCLIC in English [ ˌpɒlɪ'sʌɪklɪk , -'sɪk- ]■ adjective1》 relating to or resulting from many cycles. 2》 Chemistry having several rings of atoms in the molecule. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004