hypotrochoid

名词 n.
中文释义
英 /ˌhaɪ.pə(ʊ)ˈtɹəʊ.kɔɪd/    美 /ˌhaɪ.poʊˈtɹoʊ.kɔɪd/|/ˌhaɪ.pəˈtɹoʊ.kɔɪd/

英文释义

名词 n.
  1. A geometric curve traced by a fixed point on the radius line outside one circle which rotates inside the perimeter of another circle.

词形变化

hypotrochoids plural

词源

Etymology tree
Proto-Indo-European *upó
Ancient Greek ῠ̔πό (hŭpó)
Ancient Greek ὑπο- (hupo-)der.
English hypo-
English trochoid
English hypotrochoid
From hypo- + trochoid.
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