superphosphate

POS

Noun

HYPHEN

su=per=phos=phate

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CIDE DICTIONARY

superphosphate, n.

An acid phosphate. [1913 Webster]

Superphosphate of lime (Com. Chem.), a fertilizer obtained by trating bone dust, bone black, or phosphorite with sulphuric acid, whereby the insoluble neutral calcium phosphate, Ca3(PO4)2, is changed to the primary or acid calcium phosphate Ca(H2PO4)2, which is soluble and therefore available for the soil.

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OXFORD DICTIONARY

superphosphate, n. a fertilizer made by treating phosphate rock with sulphuric or phosphoric acid.

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