회전하는 바퀴의 번호가 매겨진 칸에 공을 떨어뜨려 멈추는 곳을 맞히는 도박 게임
A gambling game in which a ball is dropped onto a revolving wheel with numbered compartments, the players betting on the number at which the ball will come to rest.
예문:
"He lost a significant amount of money playing roulette at the casino."
"The sound of the ivory ball clicking against the roulette wheel filled the room."
우표 사이의 점선을 내거나 판화에서 선을 긋는 데 사용하는 톱니 모양의 회전 바퀴가 달린 도구
A tool or machine with a revolving toothed wheel, used for making slit-shaped perforations between postage stamps or for engraving.
예문:
"The engraver used a fine roulette to create texture on the metal plate."
"Early postage stamps were separated using a manual roulette before modern perforation machines were invented."
하나의 곡선이 다른 고정된 곡선을 따라 미끄러짐 없이 구를 때 그 곡선 위의 한 점이 그리는 궤적
The curve traced by a point on or attached to a curve as it rolls without slipping along a fixed curve.
예문:
"A cycloid is a specific type of roulette generated by a circle rolling on a straight line."
"The professor explained the mathematical properties of various roulettes in the geometry seminar."
톱니 바퀴를 사용하여 종이나 우표 시트에 점선 모양의 구멍을 내다
To make slit-shaped perforations in paper, especially sheets of postage stamps, using a toothed wheel.
예문:
"The printer rouletted the coupons so customers could tear them off easily."
"The sheet of stamps was rouletted instead of being perforated with holes."