collimator

noun

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

"collimator" is a 10-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
10
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.

Key facts for collimator
PropertyValue
Headwordcollimator
LanguageEnglish
Part of speechNoun
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “collimator” sits in English frequency

collimator 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

collimator is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.

Zero misspellings are on record for collimator in our index, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From collimate + -or. The correct English form is collimator, spelled C-O-L-L-I-M-A-T-O-R.

Definition

  1. 1
    An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.
  2. 2
    A similar device that produces a parallel beam of particles such as neutrons.
  3. 3
    A small telescope attached to a larger one, used to point it in the correct general direction.

Etymology

From collimate + -or.

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 "collimator"?
"collimator" is spelled C-O-L-L-I-M-A-T-O-R.
What does "collimator" mean?
As a noun, "collimator" means: An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.
What is the origin of the word "collimator"?
From collimate + -or. 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 “collimator”

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

  • The one correct English spelling is C-O-L-L-I-M-A-T-O-R - 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