TAUTOMER

[ 'tɔ:təmə ]

■ noun Chemistry each of two or more readily interconvertible isomers of a compound which exist together in equilibrium.

Derivatives

~ic -'mɛrɪk adjective

~ism -'tɒmərɪz(ə)m noun

Origin

early 20th cent.: blend of tauto- and isomer .