释义 |
cyl·in·der \ˈsilə̇ndə(r)\ noun (-s) Usage: often attributive Etymology: Middle French or Latin; Middle French cylindre, from Latin cylindrus, from Greek kylindros, from kylindein to roll; akin to Old English sceol wry, squinting, Old High German scelah, Old Norse skjalgr wry, squinting, Latin scelus crime, wickedness, Greek skolios curved, crooked, skelos leg, Albanian tshalëlame; basic meaning: turning, bending 1. mathematics a. : the surface traced by any straight line moving parallel to a fixed straight line and intersecting a fixed curve b. : the space bounded by any such surface and two parallel planes cutting all the elements — see volume table 2. : a cylindrical body: as a. (1) : the turning chambered breech of a revolver (2) : one type of choke boring — see choke II 3 b. (1) : a cylindrical chamber in an engine in which a piston is impelled by the pressure or expansive force of the working fluid (2) : the analogous though not cylindrical part in certain abnormal types of engines c. : a chamber in a pump from which the piston expels the fluid d. : the rapidly rotating spiked drum of a threshing machine e. (1) : plate cylinder (2) : impression cylinder (3) : blanket cylinder f. : cylinder seal g. : a cylindrical clay object inscribed with cuneiform inscriptions h. : a typewriter platen i. : a cylindrical record of a phonograph or dictating machine j. : the portion of a cylinder lock that contains the tumblers and keyhole 3. : a pivoted hollow steel shell upon which the balance of a watch is mounted and which is cut away to permit the passage of the rim of the escape wheel 4. : the square prism carrying the cards to the needles in a jacquard loom |