(Greek: a suffix; pertaining to; of the nature of, like; in chemistry, it denotes a higher valence of the element than is expressed by -ous)

A reference to an incandescent, transparent layer of gas, primarily hydrogen, several thousand miles in depth, which lies above and surrounds the photosphere (intensely bright part) of the sun but is distinctly separate from the corona (luminous envelope surrounding the sun).
chronic (adjective), more chronic, most chronic
1. A reference to diseases, etc.; lasting a long time: Rheumatism is usually a chronic ailment.
2. Descriptive of expressions of disapproval involving severe and objectionable behavior: Mike's friend was a chronic liar to such a degree that even when he told the truth no one believed him.
Relating to a perpetual habit or behavior.
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Descriptive of having a continuous and prolonged bad habit.
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Pertaining to, or in relation to, time or a time scale.
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.
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.
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.
Affecting the rate of rhythmic movements; such as, the rate of contractions of the heart.
chthonic (adjective) (not comparable)
1. Relating to the geological underworld as described in Greek mythology: In the story “The Underground Palace of Pluto” the giants Typhon, Briareus, Enceladus and their brothers were buried alive under Mount Aetna, where they still try to get loose from their chthonic abode, as indicated by the earthquakes that cause the island to tremble and to vibrate.
2. A reference to dwelling in or beneath the surface of the earth: Part of the basement of Don's house had a chthonic tunnel leading into the rock caverns in the mountainside.
3. Etymology: from Greek khthonios, "in the earth"; from khthon, "the earth, solid surface of the earth" (mostly poetic).
Resembling the dark and mysterious areas below the surface of the earth.
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The process and formation of chyle; such as, the chylopoetic organs.
Of or relating to the clitoris.