dies (DEE uhs), di-, die-, -diem, diurn- +
(Latin: day)
Don't confuse this dies, "day" (DEE uhs) with the verb dies (DIGHZ) which refers to "dying" or "death".
per diem
An amount or allowance of so much every day.
postmeridian, postmeridiem (P.M.)
1. Occurring after noon or midday; of or pertaining to the afternoon.
2. After midday; applied to the hours between noon and midnight; usually abbreviated pm or p.m.
quodian
1. Of or pertaining to every day; daily.
2. A reference to an everyday character; ordinary, commonplace, trivial.
quotidian
1. Of or pertaining to every day; daily.
2. A reference to an everyday character; ordinary, commonplace, trivial.
semidiurnal
1. In astronomy, pertaining to, consisting of, or performed in, half the time between the rising and setting of a celestial body; chiefly in semi-diurnal arc.
2. Occurring every twelve hours; primarily referring to the tides.
3. Pertaining to, or accomplished in, half a day, or twelve hours; occurring twice every day.
4. A reference to, or traversed in, six hours, or in half the time between the rising and setting of a heavenly body; such as, a semidiurnal arc.
sine die
Without any day being specified (for reassembling, resumption of business, trial of a person or cause, etc.); indefinitely.
sojourn (French)
A temporary stay at a place; a brief period of residence.
terdiurnal
Occurring or done three times a day.
tridiurnal
1. Consisting of three days.
2. Occurring three times a day.
Another related "day" unit is located at hemer-.