chrono-, chron-

(Greek: time, times; sequence of times)

chronophotograph
A photograph taken as one of a series for the purpose of showing successive phases of a motion.
chronophotography
An early term for cinematic photography.
chronoscope
1. An instrument for observing and the precise measuring of minute time intervals of extremely brief periods of time.
2. An electronic instrument used for measuring extremely short intervals of time; such as, the time it takes for a rifle bullet to pass between two points.
chronoscopic
1. A reference to an optical instrument that measures precise intervals of very small time sequences.
2. Descriptive of an electronic instrument that accurately measures very brief intervals of time; such as, in determining the velocity of projectiles.
chronoscopy
Observation and exact measurement of time.
chronosemic (adjective), more chronosemic, most chronosemic
Referring to the intervals of time with a fixed significance; as in a system of signaling, by exposing visual objects or sounding audible signals for selected intervals of time.
chronospecies (s) (noun), chronospecies (pl)
A collection of interbreeding populations that are reproductively isolated from other such groups by time: "A chronospecies changes physically, genetically, and/or in behavior over time from an early to a later point in time and so they can not be classified as the same species even if they had existed at the same point in time."
chronosphygmograph (s) (noun), chronosphygmographs (pl)
An instrument formerly used for the study of the rhythms of the pulse.
chronostratigraphy
1. The study of geologic history based on the age of rock strata (layers arranged one on top of another) and their time sequences.
2. A system of dividing geological time and eras, periods, epochs, and ages.
chronotaraxis
Distortion or confusion of the sense of time; as for dates, seasons of the year, times of day, and over estimation or under estimation of the duration of time.
chronotherapeutic
1. A reference to the treatment of certain sleep disorders by capitalizing on the natural phase delay in adults.

The bedtime is successively advanced by one to several hours each day until the individual can retire, sleep, and arise at appropriate times.

2. A descriptive term referring to the treatment of a sleep disorder; such as, insomnia, by changing a person's sleeping and waking times in an attempt to reset the patient's biological clock.
3. Referring to the administration of medication in coordination with the body's circadian rhythms (biological activities that occur during a 24-hour interval) to maximize effectiveness of treatment and to minimize any side effects.
chronotherapy, chronotherapeutics
1. Treatments of diseases that work in harmony with the body's natural time rhythms; such as, when patients are given drugs at the optimum time in their day cycle of cell growth.
2. Coordinating biological rhythms (chronobiology) with medical treatment includes a person's biological rhythms in determining the timing and sometimes the amount of medication to optimize a drug's desired effects and to minimize the undesired ones.
chronothermal
Relating to time and temperature.
chronothermometer
A timepiece so constructed as to exaggerate the effect of changes of temperature upon its rate and used to indicate mean temperature.
chronotropic
Affecting the rate of rhythmic movements; such as, the rate of contractions of the heart.