pOH

noun

By · According to Wiktionary data (CC BY-SA) ·

"poh" is a 3-letter English headword indexed on PlainSpell.

The verdict

“pOH” is an uncommon English word, ranked #60,378 in English word frequency and used as a noun.

#60,378
frequency rank, English
3
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The negative of the base 10 logarithm of the concentration of hydroxide ions, measured in moles per liter.

Key facts for pOH
PropertyValue
HeadwordpOH
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#60,378
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “pOH” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). pOH lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for pOH is 3 letters long, classified as a noun. Corpus data places it at rank #60,378 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "The negative of the base 10 logarithm of the concentration of hydroxide ions, measured in moles per liter.".

Our edit-distance generator produced no likely misspellings for pOH, suggesting the orthography follows predictable English patterns. Our dataset records no confusable match here, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From p, denoting negative logarithm, and OH, denoting the hydroxyl radical. The correct English form is pOH, spelled P-O-H.

Definition

  1. 1
    The negative of the base 10 logarithm of the concentration of hydroxide ions, measured in moles per liter.

Etymology

From p, denoting negative logarithm, and OH, denoting the hydroxyl radical.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "pOH"?
"pOH" is spelled P-O-H.
What does "pOH" mean?
As a noun, "pOH" means: The negative of the base 10 logarithm of the concentration of hydroxide ions, measured in moles per liter.
What is the origin of the word "pOH"?
From p, denoting negative logarithm, and OH, denoting the hydroxyl radical. 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 “pOH”

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

  • The one correct English spelling is P-O-H - 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