n. [ Pref. di- + tolyl. ] (Chem.) A white, crystalline, aromatic hydrocarbon, C14H14, consisting of two radicals or residues of toluene. [ 1913 Webster ]

n. [ Toluic + -yl. ] (Chem.) The hydrocarbon radical, CH3.C6H4, regarded as characteristic of certain compounds of the aromatic series related to toluene; as, tolyl carbinol. [ 1913 Webster ]

n. (Chem.) A hydrocarbon radical, C6H4.(CH2)2, regarded as characteristic of certain toluene derivatives. [ 1913 Webster ]