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talc

(Encyclopedia)talc, mineral ranging in color from white through various shades of gray and green to the red and brown of impure specimens, translucent to opaque, and having a greasy, soapy feel. It is a hydrous sil...

camass

(Encyclopedia)camass or camas both: kămˈəs [key], any species of the genus Camassia (or Quamasia), hardy North American plants of the family Lilaceae (lily family), chiefly of moist places in the far West, where...

cyanide

(Encyclopedia)cyanide sīˈənīdˌ [key], chemical compound containing the cyano group, –CN. Cyanides are salts or esters of hydrogen cyanide (hydrocyanic acid, HCN) formed by replacing the hydrogen with a metal...

papier-mâché

(Encyclopedia)papier-mâché pāˈpər-məshāˈ [key], art material made of paper strips soaked in a binder of starch or flour paste; it dries into a firm, hard substance. Papier-mâché is widely used in the prod...

hypersensitivity

(Encyclopedia)hypersensitivity, heightened response in a body tissue to an antigen or foreign substance. The body normally responds to an antigen by producing specific antibodies against it. The antibodies impart i...

ultraviolet radiation

(Encyclopedia)ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about 1015 to 1017 hert...

kumquat

(Encyclopedia)kumquat kŭmˈkwŏt [key], ornamental shrub of the genus Fortunella of the family Rutaceae (rue family), closely related to the orange and other citrus fruits. It has evergreen leaves, sweet-scented w...

tallit

(Encyclopedia)tallit tälētˈ [key], in Judaism, four-cornered, fringed shawl worn by males during the morning prayers. It is donned before putting on the phylacteries, except on Yom Kippur when it is worn all thr...

plane tree

(Encyclopedia)plane tree, sycamore, or buttonwood, any species of the genus Platanus, deciduous trees of most temperate regions of the Northern Hemisphere, exclusive of Africa. The hairy, dry, seedlike fruits are ...

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