Last Updated
：2025/11/22
rotational period
Noun
of an astronomic object
of a rotating object on the earth
Japanese Meaning
天体が自らの軸を中心にして回転するのに要する時間 / 自転周期
（ plural ）
Quizzes for review
(of an astronomic object) The time taken to rotate about its axis relative to the background stars.
音声機能が動作しない場合はこちらをご確認ください
See correct answer
rotational period
Astronomers measured the planet's rotational period by tracking surface features against the background stars.
See correct answer
Astronomers measured the planet's rotational period by tracking surface features against the background stars.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
