Dictionary.com

phosphate

[ fos-feyt ]
/ ˈfɒs feɪt /
Save This Word!

noun
Chemistry.
  1. (loosely) a salt or ester of phosphoric acid.
  2. a tertiary salt of orthophosphoric acid, as sodium phosphate.
Agriculture. a fertilizing material containing compounds of phosphorus.
a carbonated drink of water and fruit syrup containing a little phosphoric acid.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of phosphate

First recorded in 1785–95; phosph- + -ate2

OTHER WORDS FROM phosphate

sub·phos·phate, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use phosphate in a sentence

British Dictionary definitions for phosphate

phosphate
/ (ˈfɒsfeɪt) /

noun
any salt or ester of any phosphoric acid, esp a salt of orthophosphoric acid
(often plural) any of several chemical fertilizers containing phosphorous compounds

Derived forms of phosphate

phosphatic (fɒsˈfætɪk), adjective

Word Origin for phosphate

C18: from French phosphat; see phosphorus, -ate 1
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

Medical definitions for phosphate

phosphate
[ fŏsfāt′ ]

n.
A salt or ester of phosphoric acid.
adj.
Containing the trivalent radical PO4.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for phosphate

phosphate
[ fŏsfāt′ ]

A salt or ester of phosphoric acid, containing the group PO4. Phosphates are important in metabolism and are frequently used in fertilizers.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK