| alternate |
to do in succession or rotation. [1/9 definitions] |
| alternation |
repeated interchange or succession; continuous rotation. [1/2 definitions] |
| dextrorotation |
rotation or turning of the plane of polarized light to the right. |
| drill1 |
a tool consisting of a shaft that has sharp cutting edges and is used to make holes in wood, metal, or the like, usu. by means of rotation; drill bit. [1/13 definitions] |
| equatorial |
a telescope mounted on two axes, one parallel to and one perpendicular to the earth's axis of rotation. [1/3 definitions] |
| fan1 |
a mechanical apparatus, usu. driven by electricity, that creates an air current by moving several vanes or blades in rotation. [1/7 definitions] |
| geostationary |
of or pertaining to a satellite or spacecraft that travels around the earth's equator at a speed equal to the earth's rotation so as to maintain a constant relation to points on the earth's surface. |
| gyration |
the act of gyrating; rotation. |
| hiring hall |
an employment office or center, esp. one where a union places applicants in positions according to their seniority as union members, or by the principle of rotation. |
| itinerancy |
a system of rotation in the performance of official duties, as of preachers or judges, that requires frequent travel or moves from place to place. [1/3 definitions] |
| levorotation |
rotation or turning of the plane of polarization of light to the left. |
| pirouette |
a ballet movement involving a rapid rotation of the body upon the toes or foot. [1/2 definitions] |
| precession |
the complex motion of a rotating body, such as a spinning top, when subjected to a disturbing force or torque that tends to move the axis of rotation in a direction perpendicular to the direction of the force, causing it generally to describe a cone. [1/3 definitions] |
| precession of the equinoxes |
the earlier occurrence of the equinoxes in each sidereal year because of a slow variation in the rotation of the earth, caused by the gravitational pull of the sun and moon. |
| revolution |
the action of turning or spinning on an axis; rotation. [1/5 definitions] |
| rotary engine |
an engine in which rotation is produced by supplying power directly to the rotary parts, such as a turbine. [1/2 definitions] |
| rotative |
of or characterized by rotation; rotating. [2 definitions] |
| rotator cuff |
a group of muscles that cover the shoulder joint and control shoulder rotation. |
| rotatory |
of, pertaining to, producing, or characterized by rotation; rotary; rotating. [2 definitions] |
| sidereal day |
a unit of time equal to the time required for one rotation of the earth; twenty-three hours, fifty-six minutes, and 4.1 seconds. |
| sidereal time |
time based upon the rotation and revolution of the earth with reference to the background of stars. |