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dry cleaning

(Encyclopedia) dry cleaning, process of cleaning fabrics without water. Special solvents and soaps are used so as not to harm fabrics and dyes that will not withstand the effects of ordinary soap and…

tung oil

(Encyclopedia) tung oil, oil obtained from the seeds of a tropical tree, the tung tree (Aleurites fordii) of the spurge family, and from seeds of some related species, all from Indomalesia or W…

umlaut

(Encyclopedia) umlautumlaut&oobreve;mˈlout [key] [Ger.,=transformed sound], in inflection, variation of vowels of the type of English man to men. In this instance it is the end product of the…

plant breeding

(Encyclopedia) plant breeding, science of altering the genetic pattern of plants in order to increase their value. Increased crop yield is the primary aim of most plant-breeding programs; advantages…

Porto-Novo

(Encyclopedia) Porto-NovoPorto-Novopôrˈtō nōˈvō [key], city (1992 pop. 179,138), capital of Benin, S Benin, a port on Porto-Novo lagoon, an arm of the Gulf of Guinea. It is Benin's second largest…

silicone

(Encyclopedia) silicone, polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon atoms. Silicones, which…

packaging

(Encyclopedia) packaging, containment and packing prior to sale with the primary purpose of facilitating the purchase and use of a product. Before 1800 packaging was restricted almost entirely to…

cone, in mathematics

(Encyclopedia) CE5 Cone cone or conical surface, in mathematics, surface generated by a moving line (the generator) that passes through a given fixed point (the vertex) and continually intersects…

composition board

(Encyclopedia) composition board, wood product produced in the form of a board or sheet, formed of cellulose fibers or particles derived from wood or other sources, and used principally as a building…

Languedoc

(Encyclopedia) LanguedocLanguedocläNgdôkˈ [key], region and former province, S France, bounded by the foot of the Pyrenees, the upper Garonne River, the Auvergne Mts., the Rhône, and the…