Standard Lemma guide

orthophosphate

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

Any salt or ester of orthophosphoric acid; an ordinary phosphate

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, inorganic-chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a salt of phosphoric acid

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: phosphate, inorganic phosphate

Antonyms: none provided

Broader terms: salt

Narrower terms: calcium phosphate, sodium phosphate, sodium orthophosphate

History

Etymology

Etymology tree Proto-Indo-European *h3erdh-der. Proto-Hellenic *orthwós Ancient Greek ὀρθός (orthós)lbor. English ortho- English phosphate English orthophosphate From ortho- + phosphate.