superphosphate

[soo-per-fos-feyt]

su·per·phos·phate

[soo-per-fos-feyt]
noun Chemistry.
1.
Also called acid phosphate. a mixture of calcium acid phosphate and calcium sulfate prepared by treating phosphate rock with sulfuric acid: used chiefly as a fertilizer.
2.
Also called triple superphosphate. a mixture prepared with phosphoric acid and containing about 45 percent of soluble phosphates, used as a fertilizer.

Origin:
1790–1800; super- + phosphate
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Superphosphate is always a great word to know.
So is glacial. Does it mean:
of, pertaining to, or tending to develop into icelike crystals: glacial phosphoric acid
to restore or reduce to the natural or uncombined state, such as a metal
Collins
World English Dictionary
superphosphate (ˌsuːpəˈfɒsfeɪt)
 
n
1.  a mixture of the diacid calcium salt of orthophosphoric acid Ca(H2PO4)2 with calcium sulphate and small quantities of other phosphates: used as a fertilizer
2.  a salt of phosphoric acid formed by incompletely replacing its acidic hydrogen atoms; acid phosphate; hydrogen phosphate

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