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せかいせん
Meanings
Noun
Physics
1. world line
Alt. forms
世
せ
界
かい
線
せん
99%
せかいせん
Pitch accent
⚠
せ
かいせん
Used in: 1
Composed of
せかい
the world; society; sphere; circle; world-renowned; world-famous
せん
line; stripe; line (e.g. telephone line); wire; ray (e.g. X-ray); beam; line (e.g. of a railroad)