phosphate

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noun phos·phate \ˈfäs-ˌfāt\

Definition of phosphate

  1. 1a (1) :  a salt or ester of a phosphoric acid (2) :  the trivalent anion PO43− derived from phosphoric acid H3PO4b :  an organic compound of phosphoric acid in which the acid group is bound to nitrogen or a carboxyl group in a way that permits useful energy to be released (as in metabolism)

  2. 2 :  an effervescent drink of carbonated water with a small amount of phosphoric acid flavored with fruit syrup

  3. 3 :  a phosphatic material used for fertilizers

Recent Examples of phosphate from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'phosphate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of phosphate

French, from acide phosphorique phosphoric acid


PHOSPHATE Defined for English Language Learners

phosphate

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noun

Definition of phosphate for English Language Learners

  • chemistry : a salt or compound that has phosphorus in it and that is used especially in products (called fertilizers) that help plants grow


Medical Dictionary

phosphate

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noun phos·phate \ˈfäs-ˌfāt\

Medical Definition of phosphate

  1. 1a:  a salt or ester of a phosphoric acidb:  the trivalent anion PO43− derived from phosphoric acid H3PO4

  2. 2:  an organic compound of phosphoric acid in which the acid group is bound to nitrogen or a carboxyl group in a way that permits useful energy to be released (as in metabolism)



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