Alternative spelling of sulphur shelf

plural of green-backed firecrown

An area in Harborough district, Leicestershire, England, including the two villages of Kibworth Beauchamp (OS grid ref SP6893) and Kibworth Harcourt (OS grid ref SP6894).

(organic chemistry) Any of four isomeric univalent hydrocarbon radicals, C₄H₉, formally derived from butane by the loss of a hydrogen atom. / A synthetic rubber made by the polymerization of isobut...