PRIME MERIDIAN

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

Meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)

Classified under:

Nouns denoting spatial position

Hypernyms ("prime meridian" is a kind of...):

line of longitude; meridian (an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator)

Instance hyponyms:

Greenwich Meridian (the meridian passing through Greenwich; was internationally adopted as the earth's zero of longitude in 1884)

Credits