simple past tense and past participle of meridian

The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured.

plural of prime meridian

The meridian used for determining standard time.

(historical, geography) A meridian formerly used as a prime meridian; now defined as 18.160792° west.

A frisson characterized by a tingling sensation on the skin that typically begins on the scalp and moves down the back of the neck and upper spine.

plural of autonomous sensory meridian response

(astronomy) a plain on the surface of Mars; a landing site for several unmanned missions