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Of a planet: having characteristics similar to that of Earth.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Topics: literature, media, publishing, science-fiction
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Alternative letter-case form of Class M.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of, not-comparable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Originally from the TV series Star Trek.