Mean solar time at the Greenwich Meridian.

(mathematics, of a set of numbers or values) The square root of the arithmetic mean of the squares.

the average length of a solar day, used for practical timekeeping

(physics) the average distance travelled between two similar events; especially by molecules in a gas or liquid, electrons or phonons in a crystal or neutrons in a moderator

Morally wrong actions are sometimes necessary to achieve morally right outcomes; actions can be considered morally right or wrong only by virtue of the morality of the outcome.

plural of arithmetic-geometric mean

The standard time as kept on the planet Mars, determined on the prime meridian of Mars, which passes through the crater Airy-0.

plural of mean value theorem

A request for clarification of what the listener just said.

Third-person singular simple present indicative form of live beyond one's means