Japanese edit

 
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Etymology edit

Kanji in this term
てん
Grade: 1
せき
Grade: 1
どう
Grade: 2
on’yomi

(ten, heaven) + (no, -'s) + 赤道 (sekidō, equator) = “heaven's equator”

Noun edit

(てん)(せき)(どう) (ten no sekidō

  1. (astronomy) celestial equator