Sanakirja.org

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Substantiivit

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