noun see: year
Date: 13th century
a time or office for daily liturgical devotion, the 24th part of a day ; 60 minutes,
3. the time of day reckoned in two 12-hour periods, the time reckoned in one 24-hour period from midnight to midnight using a 4-digit number of which the first two digits indicate the hour and the last two digits indicate the minute ,
4. a customary or particular time , time of going to bed , an angular unit of right ascension equal to 15 degrees measured along the celestial equator, the work done or distance traveled at normal rate in an hour ,
7. a class session, credit hour , semester hour
Merriam-Webster's Collegiate® Dictionary, 11th Edition
HOUR
hour angle
noun
Date: circa 1837
the angle between the celestial meridian of an observer and the hour circle of a celestial object measured westward from the meridian
noun
Date: circa 1837
the angle between the celestial meridian of an observer and the hour circle of a celestial object measured westward from the meridian
Merriam-Webster's Collegiate® Dictionary, 11th Edition
HOUR
hour circle
noun
Date: 1690
a circle on the celestial sphere that passes through both celestial poles
noun
Date: 1690
a circle on the celestial sphere that passes through both celestial poles
Merriam-Webster's Collegiate® Dictionary, 11th Edition
HOUR
hour hand
noun
Date: 1669
the short hand that marks the hours on the face of a watch or clock
noun
Date: 1669
the short hand that marks the hours on the face of a watch or clock