Two early signs of dehydration are thirst and dark-coloured urine. This is the body's way of trying to increase water intake and decrease water loss. Other symptoms may include: 1  dizziness or light-headedness. 2  headache. 3  tiredness. 4  dry mouth, lips and eyes. 5  passing small amounts of urine infrequently (less than three or four times a day).
Diurnality is a form of plant or animal behavior characterized by activity during the day, with a period of sleeping, or other inactivity, at night. The common adjective used for daytime activity is diurnal. The timing of activity by an animal depends on a variety of environmental factors such as the temperature, the ability to gather food by sight, the risk of predation, and the time of year.
a. a particular stage or point of advancement in a cycle of motion or change. b. the fractional part of the cycle that has elapsed, measured from a fixed datum. 9. to schedule or order so as to be available when or as needed. 10. to put in phase; synchronize.