combining form from Gr. θύμο-ν THYME, used in some chemical terms: Thymoform Pharm., a yellowish antiseptic powder prepared from formaldehyde and thymol; Thymoïl, Thymoïlol, Lallemand’s names for thymoquinone and hydrothymoquinone; thence Thymoïlamide, Thymoïlate, Thymoïlic a. Thymoquinone, C10H12O2, a product of the oxidation of thymol, obtained in reddish-yellow 4-sided shining crystalline laminæ, having an aromatic odor.
1899. Coblentz, Newer Remedies (ed. 3), 134. *Thymoform.
1857. Miller, Elem. Chem., Org., III. vii. § 1. 447. According to Lallemand, when thymole is treated with oxidizing agents such as chromic acid,… it yields a substance termed *thymoile [ed. 1862 thymoil]. Ibid. If treated with sulphurous acid or other reducing agents, it [thymole] combines with hydrogen and yields *thymoilole [ed. 1862 thymoilol] [C10H12O2], the homologue of hydrokinone.
1868. Watts, Dict. Chem., V. 793. From these relations, thymoil may be regarded as homologous with quinone, thymoilol with colourless hydroquinone.
1871. Jrnl. Chem. Soc., XXIV. 351. This body [Lallemand’s thymoïlol] is hydrothymoquinone … Hydrothymoquinone is easily converted into *thymoquinone by ferric chloride, nitric acid, etc.
