INOCULUM Meaning of INOCULUM in English [ ɪ'nɒkjʊləm ]■ noun ( plural inocula ) Medicine a substance used for inoculation.Originearly 20th cent.: mod. L., from L. inoculare (see inoculate ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004