tungstic-acid

tungstic acid

noun Chemistry.
1.
a hydrate of tungsten trioxide, H 2 WO 4 ⋅H 2 O, used in the manufacture of tungsten-lamp filaments.
2.
any of a group of acids derived from tungsten by the addition of acid to a soluble tungstate or to a mixture of a tungstate and a silicate, phosphate, etc.
Origin:
1790–1800

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
tungstic acid
 
—n
any of various oxyacids of tungsten obtained by neutralizing alkaline solutions of tungstates. They are often polymeric substances, typical examples being H2WO4 (orthotungstic acid), H2W4O13 (metatungstic acid), and H10W12O14 (paratungstic acid)

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Tungstic-acid is always a great word to know.
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an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a fool or simpleton; ninny.
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