TUBERCULIN Meaning of TUBERCULIN in English [ tjʊ'bə:kjʊlɪn ]■ noun a sterile protein extract from cultures of tubercle bacillus, used to test for tuberculosis.OriginC19: from L. tuberculum (see tubercle ) + -in 1 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004