nocti-, noct-, nox +

1. A reference to a state of equal day and night.
2. The period or point of the equinox.
3. The celestial equator: so called because, when the sun is on it, the nights and days are of equal length in all parts of the world.

Equinox; (the original form in which the word was adopted).

Either of the two annual crossings of the equator by the sun, once in each direction, when the length of day and night are approximately equal everywhere on earth.

The equinoxes occur around March 21 and September 23.

1. The presence of excessive amounts of albumin in the urine secreted during the night.
2. Presence of albumin only in night urine.

The act of walking or performing another activity associated with wakefulness at night while asleep or in a sleeplike state.

1. The act or an instance of walking or performing another activity associated with wakefulness while asleep or in a sleeplike state.
2. Walking at night while asleep; also, somnambulism.

Someone who primarily walks, or eats, or performs other motor activities while asleep at night and which the person does not remember having done after waking up.

A reference to someone who walks at night or who walks around while asleep at night.

Consisting of a night and a day.

A bringer of night or darkness; the evening star.

1. A plankton that produces light. When present in large groups, they make the sea appear to glow. Of the genus, Noctiluca.
2. Any marine animalcule that produces a phosphorescent appearance in the sea.
3. Any of a genus, Noctiluca, of large, sherical, reddish, luminescent protozoa that occur in vast numbers in the sea, causing parts of it to appear luminous at night.

The light-giving substance in phosphorescent animalcules.

1. A reference to bioluminescent organisms that emit light during darkness.
2. Shining by night; as with a noctilucent cloud, a cloud of a kind that occasionally is seen at night in the summer in high latitudes, which occurs in the mesopause (atmosphere) and which some authorities believe is composed purely of cosmic dust and others of ice condensed around cosmic dust particles.
3. Designating or of a luminous cloud of unknown composition, visible at night in the polar regions at an altitude of around 50 miles.

The light-giving substance in phosphorescent animalcules.

Shining at night, phosphorescent.