biphosphate

noun

"biphosphate" is a 11-letter English headword indexed on PlainSpell.

The verdict

“biphosphate” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any salt of phosphoric acid in which only one of the hydrogen atom has been replaced by a metal ion.

Key facts for biphosphate
PropertyValue
Headwordbiphosphate
LanguageEnglish
Part of speechNoun
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “biphosphate” sits in English frequency

biphosphate falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

biphosphate is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.

No generated misspelling entries exist for biphosphate in our index, a sign its spelling follows regular English conventions. We don't track a confusable pairing for this entry, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From bi- + phosphate. The correct English form is biphosphate, spelled B-I-P-H-O-S-P-H-A-T-E.

Definition

  1. 1
    Any salt of phosphoric acid in which only one of the hydrogen atom has been replaced by a metal ion.
  2. 2
    Synonym of diphosphate.

Etymology

From bi- + phosphate.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "biphosphate"?
"biphosphate" is spelled B-I-P-H-O-S-P-H-A-T-E.
What does "biphosphate" mean?
As a noun, "biphosphate" means: Any salt of phosphoric acid in which only one of the hydrogen atom has been replaced by a metal ion.
What is the origin of the word "biphosphate"?
From bi- + phosphate. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “biphosphate”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is B-I-P-H-O-S-P-H-A-T-E - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list