Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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noun
The locus of a point on the circumference of a circle that rolls without slipping on the circumference of another circle.
Definition source: English Wiktionary via Wiktextract
Topics: geometry, mathematics, sciences
No example sentence was provided for this meaning.
Synonyms: hypocycloid
Antonyms: none provided
noun
a line generated by a point on a circle rolling around another circle
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: roulette, line roulette
Narrower terms: cardioid
History
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.
Across languages
12 source translations are retained for this English entry.
