line of longitude

Từ điển WordNet v3.1 - WordNet Dictionary

noun

an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
- all points on the same meridian have the same longitude
• Syn:
meridian
• Derivationally related forms:
meridional (for: meridian)
• Hypernyms:
great circle
• Hyponyms:
observer's meridian, prime meridian, magnetic meridian
• Instance Hyponyms:
dateline, date line, International Date Line