cyclic motion
11period — I. noun Etymology: Middle English periode, from Middle French, from Medieval Latin, Latin, & Greek; Medieval Latin periodus period of time, punctuation mark, from Latin & Greek; Latin, rhetorical period, from Greek periodos circuit, period of… …
12stroboscope — noun Etymology: Greek strobos whirling + International Scientific Vocabulary scope Date: 1896 an instrument for determining the speed of cyclic motion (as rotation or vibration) that causes the motion to appear slowed or stopped: as a. a… …
13wave front — Physics. a surface, real or imaginary, that is the locus of all adjacent points at which the phase of oscillation is the same. [1865 70] * * * Imaginary surface that represents corresponding points of waves vibrating in unison. As identical waves …
14Vortex fringe — Vor tex fringe The region immediately surrounding a disk moving flatwise through air; so called because the air has a cyclic motion as in vortex ring. [Webster 1913 Suppl.] …
15wave velocity — ▪ physics distance traversed by a periodic, or cyclic, motion per unit time (in any direction). Wave velocity in common usage refers to speed, although, properly, velocity implies both speed and direction. The velocity of a wave is equal to the… …
16lead — i. The first aircraft in a formation (lead aircraft). ii. The angular difference between the line of sight and an aiming line. See angle of lead. iii. The amount one cyclic motion is ahead of another, expressed in degrees. The opposite is lag …
17equinoxes, precession of the — Motion of the points where the Sun crosses the celestial equator, caused by precession of Earth s axis. Hipparchus noticed that the stars positions were shifted consistently from earlier measures, indicating that Earth, not the stars, was moving …
18Thermodynamics — Annotated color version of the original 1824 Carnot heat engine showing the hot body (boiler), working body (system, steam), and cold body (water), the letters labeled according to the stopping points in Carnot cycle …
19thermodynamics — thermodynamicist, n. /therr moh duy nam iks/, n. (used with a sing. v.) the science concerned with the relations between heat and mechanical energy or work, and the conversion of one into the other: modern thermodynamics deals with the properties …
20particle accelerator — accelerator (def. 7). [1945 50] * * * Device that accelerates a beam of fast moving, electrically charged atoms (ions) or subatomic particles. Accelerators are used to study the structure of atomic nuclei (see atom) and the nature of subatomic… …
