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agate

[ag-it] /ˈæg ɪt/
noun
1.
a variegated chalcedony showing curved, colored bands or other markings.
2.
a playing marble made of this substance, or of glass in imitation of it.
3.
Printing. a 5½-point type of a size between pearl and nonpareil.
Compare ruby (def 5).
Origin
1150-1200
1150-1200; Middle English ac(c)ate, achate, agaten (compare Dutch agaat, Old Saxon agāt, Old High German agat), apparently < Old French agathe or Italian agata (initial stress) ≪ Medieval Latin achātēs < Greek achā́tēs
Related forms
agatelike, agatoid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for agatoid

agate1

/ˈæɡɪt/
noun
1.
an impure microcrystalline form of quartz consisting of a variegated, usually banded chalcedony, used as a gemstone and in making pestles and mortars, burnishers, and polishers. Formula: SiO2
2.
a playing marble of this quartz or resembling it
3.
(printing, US & Canadian) Also called ruby. (formerly) a size of printer's type approximately equal to 51/2 point
Word Origin
C16: via French from Latin achātēs, from Greek akhatēs

agate2

/əˈɡeɪt/
adverb
1.
(Northern English, dialect) on the way
Word Origin
C16: a-² + gate³

Agate

/ˈæɡeɪt/
noun
1.
James (Evershed). 1877–1947, British theatre critic; drama critic for The Sunday Times (1923–47) and author of a nine-volume diary Ego (1935–49)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for agatoid

agate

n.

1560s, from Middle French agathe (16c.), from Latin achates, from Greek akhates, the name of a river in Sicily where the stones were found (Pliny). But the river could as easily be named for the stone.

The earlier English form of the word, achate (early 13c.), was directly from Latin. Figurative sense of "a diminutive person" (c.1600) is from the now-obsolete meaning "small figures cut in agates for seals," preserved in typographer's agate (1838), the U.S. name of the 5.5-point font called in Great Britain ruby. Meaning "toy marble made of glass resembling agate" is from 1843 (colloquially called an aggie).

Online Etymology Dictionary, © 2010 Douglas Harper
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agatoid in Science
agate
  (āg'ĭt)   
A type of very fine-grained quartz found in various colors that are arranged in bands or in cloudy patterns. The bands form when water rich with silica enters empty spaces in rock, after which the silica comes out of solution and forms crystals, gradually filling the spaces from the outside inward. The different colors are the result of various impurities in the water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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agatoid in the Bible

(Heb. shebo), a precious stone in the breast-plate of the high priest (Ex. 28:19; 39:12), the second in the third row. This may be the agate properly so called, a semi-transparent crystallized quartz, probably brought from Sheba, whence its name. In Isa. 54:12 and Ezek. 27:16, this word is the rendering of the Hebrew cadcod, which means "ruddy," and denotes a variety of minutely crystalline silica more or less in bands of different tints. This word is from the Greek name of a stone found in the river Achates in Sicily.

Easton's 1897 Bible Dictionary
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