leap second

短语

n. 闰秒

词形变化

leap seconds 复数 leap seconds

释义与例句

n.
  1. 1.

    A second of time added to the year occasionally to compensate for variation in the rate of Earth's rotation relative to the absolute standards of time.

    闰秒

词汇关系

名词

上位词 3

second s sec

词源

1971; derived from the terminology for leap day/leap year.

来源：wiktionary