To call someone without preparation or referral.

Sudden and complete withdrawal from a dependent substance, especially a drug. / The physiological effects of such a withdrawal.

(idiomatic) Not gradually; all at once. Refers especially to quitting a habit by force of will rather than by a gradual reduction.

Having an unregulated body temperature; ectothermic. / Lacking emotion or compunction.

(metallurgy) Of metal: brittle at low temperatures.

(pathology) A chronic abscess that forms slowly, without pain, heat or inflammation.

(pathology) A very common, mild viral infection of the nose and throat, whose symptoms include sneezing, sniffling, a running or blocked nose, a sore throat, coughing and a headache.

plural of cold sore

Cooked, sliced meat served cold, as in a sandwich or a tray of finger food.

(of a vacuum tube or fluorescent lamp) not heated by a filament