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abacus, in architecture

(Encyclopedia)abacus ăbˈəkəs [key], in architecture, flat slab forming the top member of a capital. In classical orders it varies from a square form having unmolded sides in the Greek Doric, to thinner proporti...

argonaut, in zoology

(Encyclopedia)argonaut, in zoology: see paper nautilus. ...

archangel, in religion

(Encyclopedia)archangel ärkˈānjəl [key], chief angel. They are four to seven in number. Sometimes specific functions are ascribed to them. The four best known in Christian tradition are Michael, Gabriel, Raphae...

Arethusa, in botany

(Encyclopedia)Arethusa: see orchid.

lake, in dyeing

(Encyclopedia)lake, in dyeing, an insoluble pigment formed by the reaction between an organic dye and a mordant. The color of a lake depends upon the mordant as well as the dye used. Generally, lakes are not as col...

Paradise, in religion

(Encyclopedia)Paradise: see Eden, Garden of; heaven. ...

parsnip, in botany

(Encyclopedia)parsnip, garden plant (Pastinaca sativa) of the family Umbelliferae (parsley family), native to the Old World. It has been cultivated since Roman times for its long, fleshy, edible root. Wine and beer...

period, in grammar

(Encyclopedia)period: see punctuation.

period, in physics

(Encyclopedia)period, in physics: see harmonic motion; wave. ...

rocket, in botany

(Encyclopedia)rocket, in botany, popular name for several plants of the family Cruciferae (or Brassicaceae; mustard family). The dame's, or damask, violet, damewort, or sweet rocket is Hesperis matronalis, a hardy,...