ETYM Latin chronicus, Greek, concerning time, from kronos time: cf. French chronique.
(Medicine) Being long-lasting and recurrent or characterized by long suffering.
In medicine, term used to describe a condition that is of slow onset and then runs a prolonged course, such as rheumatoid arthritis or chronic bronchitis. In contrast, an acute condition develops quickly and may be of relatively short duration.
Having a habit of long standing; SYN. confirmed, habitual, inveterate.