mini-neptune

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|astronomy}} 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 [[volatile]]s).

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.