constantan constant • Constantine · · · Info · Definitions · Synonyms · Characters · · constantan · · Text Latin · · Script 10 · · Length Definitions · · · (noun) an alloy of copper and nickel with high electrical resistance and a low temperature coefficient; used as resistance wire. Synonyms: Eureka. · · Noun Definition 1 Synonyms · · · eureka · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074