mesosphere

noun

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

The verdict

“mesosphere” 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 September 3, 2026) - The layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.

Corpus desk

Index EN-mesosphere · mesosphere · English

mesosphere · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "M" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

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

Long-tail rank of “mesosphere” in English

mesospherefalls 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

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

Our edit-distance generator produced no likely misspellings for mesosphere, and the word's spelling is regular enough that our generator found nothing worth flagging. Our dataset records no confusable match here, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From meso- + -sphere. The correct English form is mesosphere, spelled M-E-S-O-S-P-H-E-R-E.

Definition

  1. 1
    The layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
  2. 2
    The lower mantle, a layer inside the Earth.

Recorded use

Wiktionary example

These source excerpts show how mesosphere appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. The mesosphere may be described as the earth's intermediate or middle atmosphere, which separates the thermosphere above from the ozonosphere (or stratosphere) below, both of which are responsible for absorption of most of the ultraviolet part of the solar radiation and preventing it from reaching the earth's surface.

Etymology

From meso- + -sphere.

This word in other languages

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 "mesosphere"?
"mesosphere" is spelled M-E-S-O-S-P-H-E-R-E.
What does "mesosphere" mean?
As a noun, "mesosphere" means: The layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
What is the origin of the word "mesosphere"?
From meso- + -sphere. 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.

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

Source: FrequencyWords open word-frequency list