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phosphate

American  
[fos-feyt] / ˈfɒs feɪt /

noun

  1. Chemistry.

    1. (loosely) a salt or ester of phosphoric acid.

    2. a tertiary salt of orthophosphoric acid, as sodium phosphate.

  2. Agriculture. a fertilizing material containing compounds of phosphorus.

  3. a carbonated drink of water and fruit syrup containing a little phosphoric acid.


phosphate British  
/ ˈfɒsfeɪt, fɒsˈfætɪk /

noun

  1. any salt or ester of any phosphoric acid, esp a salt of orthophosphoric acid

  2. (often plural) any of several chemical fertilizers containing phosphorous compounds

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

phosphate Scientific  
/ fŏsfāt′ /
  1. A salt or ester of phosphoric acid, containing the group PO 4. Phosphates are important in metabolism and are frequently used in fertilizers.


Other Word Forms

Etymology

Origin of phosphate

First recorded in 1785–95; phosph- + -ate 2

Vocabulary lists containing phosphate

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But the ports on the Red Sea weren’t built for phosphate trade.

From The Wall Street Journal • May 13, 2026

The company is scaling back phosphate production in the U.S. and Brazil and withdrew its production guidance.

From Barron's • May 11, 2026

On Monday, the company withdrew its guidance for phosphate production amid record sulfur prices.

From Barron's • May 11, 2026

Mosaic, a leader in potash and phosphate fertilizers, reported a net loss of $258 million in the first quarter.

From Barron's • May 11, 2026

It was caused not by an insecticide but by a substance belonging chemically to the same group as the organic phosphate insecticides.

From "Silent Spring" by Rachel Carson

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