n. [ Salicin + -yl. ] (Chem.) The hypothetical radical of salicylic acid and of certain related compounds. [ 1913 Webster ]

n. [ Salicylic + aldehide. ] (Chem.) A thin, fragrant, colorless oil, HO.C6H4.CHO, found in the flowers of meadow sweet (Spiraea), and also obtained by oxidation of salicin, saligenin, etc. It reddens on exposure. Called also salicylol, salicylic aldehyde, and formerly salicylous acid or spiroylous acid. [ 1913 Webster ]

n. (Chem.) A salt of salicylic acid. [ 1913 Webster ]

a. (Chem.) Pertaining to, derived from, or designating, an acid formerly obtained by fusing salicin with potassium hydroxide, and now made in large quantities from phenol (carbolic acid) by the action of carbon dioxide on heated sodium phenolate. It is a white crystalline substance. It is used as an antiseptic, and in its salts in the treatment of rheumatism. Called also hydroxybenzoic acid. [ 1913 Webster ]

n. [ Salicylic + anhydride. ] (Chem.) A white crystalline substance obtained by dehydration of salicylic acid. [ 1913 Webster ]

n. (Chem.) A compound of salicylal; -- named after the analogy of a salt. [ 1913 Webster ]

n. [ Salicylic + L. oleum oil. ] (Chem.) Same as Salicylal. [ 1913 Webster ]

a. (Chem.) Pertaining to, or designating, a substance formerly called salicylous acid, and now salicylal. [ Obs. ] [ 1913 Webster ]