COAL TAR
\kˈə͡ʊl tˈɑː], \kˈəʊl tˈɑː], \k_ˈəʊ_l t_ˈɑː]\
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A by-product of the destructive distillation of coal used as a topical antieczematic. It is an antipruritic and keratoplastic agent used also in the treatment of psoriasis and other skin conditions. Occupational exposure to soots, tars, and certain mineral oils is known to be carcinogenic according to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985) (Merck Index, 11th ed).
By DataStellar Co., Ltd
By William Dodge Lewis, Edgar Arthur Singer
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One of the distillation products of coal; a dark viscous mass from which many organic compounds are prepared which are used in making many dyes and medical preparations. [Ang.-Sax.]
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A dark, semiliquid substance obtained in the dry distillation of coal. It is highly complex in structure, yielding by distillation and rectification many valuable products such as naphthalene and other solids, benzene and other neutral hydrocarbons, phenol and other alcohols, ammonia and other bases, as well as illuminating gases, heating gases, and certain impurities.
By Smith Ely Jelliffe
Word of the day
basidiomycota
- comprises fungi bearing the spores on basidium: Gasteromycetes (puffballs); Tiliomycetes (comprising orders Ustilaginales (smuts) and Uredinales (rusts)); Hymenomycetes (mushrooms; toadstools; agarics; bracket fungi); in some classification systems considered a division of kingdom comprises fungi bearing spores on a basidium; includes Gasteromycetes (puffballs) Tiliomycetes comprising the orders Ustilaginales (smuts) and Uredinales (rusts) Hymenomycetes (mushrooms, toadstools, agarics bracket fungi).