thymine thymicolymphatic • thymiosis · · · Info · Definitions · Synonyms · Characters · · thymine · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine. Synonyms: T. · · Noun Definition 1 Synonyms · · · t · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074 y latin small letter y U+0079