a bearing consisting of cylindrical or tapered rollers running between races in two concentric rings, one of which is mounted on a rotating or oscillating part, as a shaft.
a bearing in which a shaft runs on a number of hardened-steel rollers held within a cage
Trademark. 1. a brand of in-line skates. verb (used without object), Rollerbladed, Rollerblading. 2. (often lowercase) to skate on in-line skates. noun 1. trademark a type of roller skate in which the wheels are set in a single straight line under the boot
- Roller-blind shutter
[roh-ler-blahynd] /ˈroʊ lərˌblaɪnd/ noun, Photography. 1. curtain shutter.
- Roller caption
noun 1. (television) caption lettering that moves progressively up or across the picture, as for showing the credits at the end of a programme Often shortened to roller
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