or·tho·phos·phate

[awr-thuh-fos-feyt]
noun Chemistry.
a salt or ester of orthophosphoric acid, or any compound containing the trivalent group −PO 4 .

Origin:
1855–60; ortho- + phosphate

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orthophosphate (ˌɔːθəʊˈfɒsfeɪt) [Click for IPA pronunciation guide]
 
n
any salt or ester of orthophosphoric acid

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Orthophosphate is always a great word to know.
So is ninnyhammer. Does it mean:
a scrap or morsel of food left at a meal.
a fool or simpleton; ninny.
Example sentences
Orthophosphate can interact with other cations such as calcium or magnesium which may be present in the water.
The total orthophosphate test is largely a measure of orthophosphate.
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