Roller-chain
noun
1.
a power chain consisting of parallel pairs of flat links joined by pins covered with rollers, and engaging with the teeth of sprockets.
roller chain
noun
1.
(engineering) a chain for transmitting power in which each link consists of two free-moving rollers held in position by pins connected to sideplates
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- Rollercoaster
[roh-ler-koh-ster, roh-li-] /ˈroʊ lərˌkoʊ stər, ˈroʊ lɪ-/ verb (used without object) 1. to go up and down like a roller coaster; rise and fall: a narrow road roller-coastering around the mountain; a light boat roller-coastering over the waves. 2. to experience a period of prosperity, happiness, security, or the like, followed by a contrasting period […]
- Roller-coaster
[roh-ler-koh-ster, roh-li-] /ˈroʊ lərˌkoʊ stər, ˈroʊ lɪ-/ verb (used without object) 1. to go up and down like a roller coaster; rise and fall: a narrow road roller-coastering around the mountain; a light boat roller-coastering over the waves. 2. to experience a period of prosperity, happiness, security, or the like, followed by a contrasting period […]
- Roller-derby
Trademark. 1. a contest between two teams on roller skates, held on a circular, usually banked board track, in which the teams race around the track in each unit of play, working to free a teammate or teammates for the opportunity to score by lapping one or more opponents. roller derby noun 1. a race […]
- Roller-gate
noun 1. (on certain dams) a cylindrical gate that rises and falls by rotating against inclined racks.
- Roller-hockey
noun 1. a game similar to ice hockey played on roller skates.