虚岁。东亚计龄法，传统计龄体系中新生儿即被视为一岁，且每年元旦时所有人的年龄均增加一岁。

1. East Asian age reckoning, traditional system of age reckoning whereby newborns are considered one year old and on New Year's Day one year is added to everyone's age

noun (common) (futsuumeishi)