WordReference Random House Unabridged Dictionary of American English © 2026
tol•i•dine
(tol′i dēn′, -din),USA pronunciation n. [Chem.]
- any of several isomeric derivatives of biphenyl containing two methyl and two amino groups, esp. the ortho isomer that is used as a reagent and in the preparation of dyes.
- tol(uene) + -id3 + -ine2 1895–1900