Word.ws English Dictionary

Sea of Tranquility

Sea of Tranquility proper noun: a basin in Nearside, Moon, Earth, Solar System; location of the first manned moon landing, in 1969.

Proper noun

the Sea of Tranquility

  1. A basin in Nearside, Moon, Earth, Solar System; location of the first manned moon landing, in 1969.
    Synonyms:
    Mare Tranquillitatis

Synonyms of Sea of Tranquility

  • Mare Tranquillitatis

Forms of Sea of Tranquility

alternative formSea of Tranquillity

Origin of Sea of Tranquility

Calque of Latin Mare Tranquilitātis (spelled with one L), from Latin mare (“sea”)+tranquilitātis (“tranquility”). Coined by Italian Jesuit astronomer Giovanni Battista Riccioli, by labelling a map created by Italian Jesuit optician Francesco Maria Grimaldi, and then published in 1651 in the Almagestum Novum.

Words formed from Sea of Tranquility

  • Tranquility Base

Questions about Sea of Tranquility

What does Sea of Tranquility mean?
Sea of Tranquility means a basin in Nearside, Moon, Earth, Solar System; location of the first manned moon landing, in 1969.
What part of speech is Sea of Tranquility?
Sea of Tranquility is a proper noun.

Words near Sea of Tranquility in the dictionary

  1. Sea of Okhotsk
  2. Sea of Sodom
  3. Sea of Storms
  4. Sea of the Hebrides
  5. Sea of the Philistines
  6. Sea of Tranquility
  7. Sea of Tranquillity
  8. sea onion
  9. sea onions
  10. sea ooze
  11. sea orange

Source and license

Adapted from Wiktionary: Sea of Tranquility (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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