Alternative form of Wuchang

(engineering) One of a set of wheels of different sizes and number of teeth, that may be changed or substituted for one another in machinery, to produce a different but definite rate of angular velocity in an axis, as in cutting screws, gear, etc.

(physics, chemistry) A change affecting the form of a chemical substance, but not its chemical composition.

(automotive) the process of draining old oil from an engine or gearbox and refilling with fresh oil, often done at recommended intervals.

(intransitive, baseball) To throw a pitch at a much slower than expected speed. / (intransitive) To confuse someone by doing something unexpected or in an unexpected way.

(military, archaic) To turn a horse around; especially, when exercising in a circle, to cross the center and resume circling in the other direction.

Synonym of Yangtze

The changing of clocks one hour forward or backward, in line with daylight saving time.

(US, Canada, idiomatic) To redirect someone's attention.

Negative short-term reaction to changes in a product or service.