10 results for: Wolfram

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wolf·ram

Audio Help [wool-fruh

m, vawl-] Pronunciation Key

–noun

1.	Chemistry. tungsten.

2.	Mineralogy. wolframite.

[Origin: 1750–60; < G Wolfram orig., wolframite, prob. equiv. to Wolf wolf + -ram, repr. MHG rām soot, dirt; formed on the model of personal names with initial Wolf-, as a contemptuous epithet for the mineral, which was considered worthless in comparison with tin ores, with which it is often found

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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American Heritage Dictionary - Cite This Source - Share This

tung·sten Audio Help (tŭng'stən) Pronunciation Key
n. Symbol W
A hard, brittle, corrosion-resistant, gray to white metallic element extracted from wolframite, scheelite, and other minerals, having the highest melting point and lowest vapor pressure of any metal. Tungsten and its alloys are used in high-temperature structural materials; in electrical elements, notably lamp filaments; and in instruments requiring thermally compatible glass-to-metal seals. Atomic number 74; atomic weight 183.84; melting point 3,410°C; boiling point 5,900°C; specific gravity 19.3 (20°C); valence 2, 3, 4, 5, 6. Also called wolfram. See Table at element.

[Swedish : tung, heavy (from Old Norse thungr) + sten, stone (from Old Norse steinn; see stāi- in Indo-European roots).]

tung·sten'ic (-stěn'ĭk) adj.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

American Heritage Dictionary - Cite This Source - Share This

wolf·ram Audio Help (wŏŏl'frəm) Pronunciation Key
n. See tungsten.

[German, wolframite, tungsten : probably Wolf, wolf (from Middle High German, from Old High German; see wk^wo- in Indo-European roots) + -ram (from Middle High German rām, dirt).]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
wolfram

1757, from Ger. Wolfram, wolform "iron tungstate" (1562), of obscure etymology. It looks like "wolf-cream" (from rahm "cream"), but the second element might be M.H.G. ram (Ger. Rahm) "dirty mark, soot;" if so, perhaps "so called in sign of contempt because it was regarded of lesser value than tin and caused a considerable loss of tin during the smelting process in the furnace" [Klein]. Or perhaps the word is originally a personal name, "wolf-raven."

WordNet - Cite This Source - Share This

wolfram
noun
a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite [syn: tungsten]