lunar day
noun/ˌluːnə ˈdeɪ/
/ˌluːnər ˈdeɪ/
(astronomy)- the time it takes for the moon to go around the earth and pass the same point on the earth’s surface a second time (about 24 hours and 50 minutes)
太阴日，月球日（月球绕地球转一周的时间，约 24 小时 50 分）