"Day" always means 24 hours, at least on Earth. You take your Rx three times ... spaced as evenly as possible ... during whatever part of the 24-hour day you're awake.
its 1/2
45 minutes is 3/4 of an hour. 45/60 = 3/4
1 hour = 60 minutes 35/60 = 7/12
15 minutes is 1/4 hour or .25 hours.
A 60th part of an hour is called a minute.
A second of arc.
It does not have a name, it does not exist.
The Preamble.
The Altar.
a nucleus
The curved part of a saddle is called the "seat."
Root
Iris
The Duodenum.
hardware
Masonic tradition refers to a toast given at the ninth hour of the evening. This toast is given in honor of Masons who are not present during a Lodge meeting, but who are remembered as part of the Brethren and missed by their absence.