English Explanatory Dictionary

mini-Neptune

English dictionary entry

Meanings

noun
  1. A planet less massive than Neptune but resembling Neptune in that it has a thick hydrogen-helium atmosphere, probably with deep layers of ice, rock or liquid oceans (made of water, ammonia, a mixture of both, or heavier volatiles).

Word forms

mini-Neptune mini-Neptunes

Synonyms

gas dwarf transitional planet
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