Formalin formalesque • formalism · · · Info · Definitions · Synonyms · Characters · · Formalin · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a 10% solution of formaldehyde in water; used as a disinfectant or to preserve biological specimens. Synonyms: formalin, formol. · · Noun Definition 1 Synonyms · · · formol · · Synonym 1 Characters · · F latin capital letter f U+0046 a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072