epicycloid
名词 n.
英文释义
名词 n.
- The locus of a point on the circumference of a circle that rolls without slipping on the circumference of another circle.
词形变化
词源
Etymology tree
Proto-Indo-European *h₁ep-der.
Proto-Indo-European *h₁épsder.
Proto-Indo-European *h₁epi
Proto-Hellenic *epí
Ancient Greek ἐπί (epí)
Ancient Greek ἐπῐ- (epĭ-)der.
English epi-
English cycloid
English epicycloid
From epi- (“above or outside”) + cycloid.
Proto-Indo-European *h₁ep-der.
Proto-Indo-European *h₁épsder.
Proto-Indo-European *h₁epi
Proto-Hellenic *epí
Ancient Greek ἐπί (epí)
Ancient Greek ἐπῐ- (epĭ-)der.
English epi-
English cycloid
English epicycloid
From epi- (“above or outside”) + cycloid.
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数据来源: Wiktionary