| alternate |
to continuously rotate or take turns with one another (usu. fol. by "with"). [1/9 definitions] |
| ball bearing |
a bearing composed of a track containing freely rolling metal balls, against which or within which a shaft or other part can rotate without friction. [1/2 definitions] |
| ball joint |
a mechanical joint, often found in tools and machines, in which the ball-shaped end of a rod or pipe is fitted into a hollow socket, enabling the inserted part to rotate freely in any direction. |
| birl |
to rotate (a floating log) by running in place on its exposed surface, as in a contest among lumberjacks. |
| crank |
to rotate a crank. [1/6 definitions] |
| day |
a unit of time equal to twenty-four hours, or the time it takes the earth to rotate once on its axis. [1/5 definitions] |
| gyrate |
to move or revolve on or around a fixed point or axis, or in a circle or spiral; rotate; spin. |
| hamstring |
any of three muscles at the back of the human thigh that are used to flex the knee, rotate the leg, and extend the thigh. [1/5 definitions] |
| hurdy-gurdy |
an early lute-shaped string instrument played by turning a crank that causes a rosined wheel to rotate against the strings. [1/2 definitions] |
| pitch1 |
of a rocket or the like, to rotate about an axis extending from front to back. [1/23 definitions] |
| pivot |
to rotate, swing, or oscillate on or as if on a pivot. [2/6 definitions] |
| potter's wheel |
a device consisting of a horizontal disk made to rotate by foot or motor power, that enables a potter to create cylindrical or rounded shapes in clay. |
| pronate |
to turn or rotate (the hand or forearm) so that the palm of the hand faces down or backwards. |
| racemic |
of a chemical compound, containing equal quantities of isomers that rotate polarized light to the left and right, so that the net effect is zero. |
| radiometer |
an instrument for measuring radiant energy or transforming radiant energy into mechanical energy, consisting of vertical vanes that absorb more heat on one side than the other, so that they rotate around an axis when irradiated. |
| rotifer |
any of a group of mostly freshwater, microscopic, multicellular organisms that have one or more wheel-like rings of cilia at the front end which appear to rotate when vibrated. |
| screw |
a device consisting of rotary blades oriented so that they pull or drive something by transferring helical force as they rotate; screw propeller. [1/17 definitions] |
| spin |
to rotate or seem to whirl rapidly. [1/15 definitions] |
| supinate |
to turn or rotate (the hand or forearm) so that the palm is upward or forward. |
| turn |
to rotate or revolve on a point or axis. [1/32 definitions] |
| twirl |
to cause to spin or revolve quickly; rotate. [2/6 definitions] |