walled plain
nounEtymology From walled + plain.
1
Astronomy, Natural sciences A large impact crater that has a relatively flat floor, surrounded by a wall
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
Etymology From walled + plain.
Astronomy, Natural sciences A large impact crater that has a relatively flat floor, surrounded by a wall
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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