sea lion

/ˈsiː ˈlaɪən/

//ˈsiː ˈlaɪən// noun

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

"sea-lion" is a 7-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A marine mammal of most genera in the family Otariidae (the eared seals).

Key facts for sea lion
PropertyValue
Headwordsea lion
LanguageEnglish
Part of speechNoun
IPA/ˈsiː ˈlaɪən/
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “sea lion” sits in English frequency

sea lion 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

sea lion is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈsiː ˈlaɪən/. Rarity is why readers land here mid-draft. 4 senses are on record.

sea lion has no tracked misspelling variants, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From sea + lion, named from its marine habitat and its lion-like barking roar and mane. Compare Middle English see hound, cee-hound, se hound (“beaver”, literally “sea-hound”). The correct English form is sea lion, spelled S-E-A- -L-I-O-N.

Definition

  1. 1
    A marine mammal of most genera in the family Otariidae (the eared seals).
  2. 2
    A monster consisting of the upper part of a lion combined with the tail of a fish (a lion marined).
  3. 3
    A steamer transporting cattle from the ports of Texas.
  4. 4
    A cow or bull transported by steamer from the ports of Texas.

Etymology

From sea + lion, named from its marine habitat and its lion-like barking roar and mane. Compare Middle English see hound, cee-hound, se hound (“beaver”, literally “sea-hound”).

This word in other languages

león marino(Español)otarie(Français)Seelöwe(Deutsch)

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 "sea lion"?
"sea lion" is spelled S-E-A- -L-I-O-N. The IPA pronunciation is /ˈsiː ˈlaɪən/.
What does "sea lion" mean?
As a noun, "sea lion" means: A marine mammal of most genera in the family Otariidae (the eared seals).
How do you pronounce "sea lion"?
The IPA (International Phonetic Alphabet) transcription for "sea lion" is /ˈsiː ˈlaɪən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "sea lion"?
From sea + lion, named from its marine habitat and its lion-like barking roar and mane. Compare Middle English see hound, cee-hound, se hound (“beaver”, literally “sea-hound”). 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 “sea lion”

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

  • The one correct English spelling is S-E-A- -L-I-O-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈsiː ˈlaɪən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • 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