経度|けいどkeido[1]atamadaka (head-high)

1. nounlongitude
   赤道せきどうにおける経度けいど1度ど当あたりの長ながさ。↗

   Distance per degree of longitude at equator.

• Related子午線しごせんWrittenWritten/formal word for the line running from the North Pole to the South Pole, e.g. 「日本標準時子午線」; it is a line, while 「経度」 is a measure in degrees.
• Related経線けいせんWrittenWritten/formal term, used in geography and cartography, for the lines that show longitude; synonymous with 「子午線」, it names a line rather than a degree value.
• Antonym緯度いどNeutralNeutral term for latitude, which locates a point north-south on the globe; the counterpart of 「経度」, which handles east-west position.

Use 「経度」 for degrees of east-west position, as in 「東経135度」; the corresponding lines are 「経線」 and 「子午線」; for north-south position the word is 「緯度」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 本初ほんしょ子午線しごせんを0度どとし、ある地点ちてんの東西とうざいの位置いちを表あらわす度合どあい。