different between hypocycloid vs roulette

English

Etymology

hypo- (“below or inside”) +? cycloid

Noun

hypocycloid (plural hypocycloids)

1. (geometry) The locus of a point on the circumference of a circle that rolls without slipping inside the circumference of another circle.

Translations

See also

• cycloid
• epicycloid
• roulette
• Spirograph™
• astroid

English

Etymology

Borrowed from French roulette (“roulette, little wheel”).

Pronunciation

• IPA^(key): /?u??l?t/
• Rhymes: -?t

Noun

roulette (countable and uncountable, plural roulettes)

1. (uncountable) A game of chance, in which a small ball is made to move round rapidly on a circle divided off into numbered red and black spaces, the one on which it stops indicating the result of a variety of wagers permitted by the game.
2. (uncountable, figuratively) An instance of risk-taking, especially when the downside exceeds the upside (contrary to the game of roulette where only the wager is lost).
   • 2020 November 2, Adam Finn quoted by Alessandra Scotto Di Santolo in Daily Express[1]:

     By contrast giving treatments open-label slows everything down by leading us up blind alleys while playing roulette with our patients' lives.

3. (countable) A small toothed wheel used by engravers to roll over a plate in order to produce rows of dots.
4. (countable) A similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint.
5. (countable, geometry) The locus of a point on a plane curve that rolls without slipping along another fixed plane curve.
6. (philately) Any of the small incisions on a sheet of stamps, used as an alternative to perforations.
7. A cylindrical curler for the hair.

Derived terms

Related terms

• roll

Translations

Verb

roulette (third-person singular simple present roulettes, present participle rouletting, simple past and past participle rouletted)

1. To separate or decorate by incisions made with a small toothed wheel.

   to roulette a sheet of postage stamps

See also

• cycloid
• epicycloid
• hypocycloid
• Wikipedia article on roulette, the game
• Wikipedia article on roulettes in geometry

French

Etymology

rouler +? -ette

Pronunciation

• IPA^(key): /?u.l?t/

Noun

roulette f (plural roulettes)

1. small wheel
2. caster, castor
3. (geometry, archaic) cycloid
4. roulette (game)
5. roulette wheel
6. (engraving) roulette
7. roller

8. (dentistry) dentist drill
9. pastry roller

Synonyms

• rouette

Derived terms

Descendants

References

• WordReference, roulette

Further reading

• “roulette” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

Italian

Etymology

Borrowed from French roulette.

Noun

roulette f (invariable)

1. roulette (game of chance)

Derived terms

• roulette russa (“Russian roulette”)

Anagrams

• tutelerò