noun
: time reckoned in mean solar time units continuously through the 24 hours beginning either at noon or since 1925 at midnight of each civil day — compare greenwich time
noun
: time reckoned in mean solar time units continuously through the 24 hours beginning either at noon or since 1925 at midnight of each civil day — compare greenwich time
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012