early 15c., of diseases, "lasting a long time," from Middle French chronique, from Latin chronicus, from Greek khronikos "of time, concerning time," from khronos "time" (see chrono-). Vague disapproving sense (from 17c.) is from association with diseases and later addictions.
chronic chron·ic (krŏn'ĭk)
adj.
Of long duration. Used of a disease of slow progress and long continuance.
| chronic (krŏn'ĭk) Relating to an illness or medical condition that is characterized by long duration or frequent recurrence. Diabetes and hypertension are chronic diseases. Compare acute. |