太たい陽よう歯は車ぐるま

Meanings

1

noun

sun gear; sun wheel

Technical term in mechanical engineering; the central gear in a planetary gear train.

car

遊ゆう星せい歯は車ぐるま
Planet gear; meshes with the sun gear and ring gear in a planetary gear set.
内うち歯は車ぐるま
Ring gear (internal gear); the outer gear with teeth on the inside, meshing with planet gears.

Compound of 太陽 (taiyō, 'sun') + 歯車 (haguruma, 'gear'), calque of English 'sun gear'.