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block and tackle

(Encyclopedia)block and tackle: see pulley.

Blues and Greens

(Encyclopedia)Blues and Greens, political factions in the Byzantine Empire in the 6th cent. They took their names from two of the four colors worn by the circus charioteers. Their clashes were intensified by religi...

Urim and Thummim

(Encyclopedia)Urim and Thummim yo͞oˈrĭm, thŭmˈĭm [key], in the Bible, name of sacred instruments used for casting lots. The meaning of the two names is uncertain, as is the nature of the lots. They were in so...

Weber and Fields

(Encyclopedia)Weber and Fields wĕbˈər [key], American comedy team. The partners were Joe Weber (Joseph Maurice Weber), 1867–1942, and Lew Fields (Lewis Maurice Schanfield), 1867–1941, both born in New York C...

Formulas for the Volumes of Some Common Solids (table)

(Encyclopedia)Formulas for the Volumes of Some Common Solids 1 Abbreviations: B = area of base; h = height; r = radius; l = length; w = width. ...

decimal system

(Encyclopedia)decimal system [Lat.,=of tenths], numeration system based on powers of 10. A number is written as a row of digits, with each position in the row corresponding to a certain power of 10. A decimal point...

clock

(Encyclopedia)CE5 A pendulum clock: Weight-driven clock mechanism clock, instrument for measuring and indicating time. Predecessors of the clock were the sundial, the hourglass, and the clepsydra. See also watc...

spraying

(Encyclopedia)spraying, horticultural practice of applying fungicides, insecticides, and herbicides, usually in solution, to plants. It may be accomplished by various means, e.g., the watering can, sprinkler attach...

cirrhosis

(Encyclopedia)cirrhosis sərōˈsəs [key], degeneration of tissue in an organ resulting in fibrosis, with nodule and scar formation. The term is most often used in relation to the liver, because that organ is most...

coronavirus

(Encyclopedia)coronavirus, any of a group (family Coronaviridae, subfamily Orthocoronavirinae) of enveloped single-stranded RNA viruses that have a crownlike or sunlike appearance under an electron microscope due t...