(computing) A change in one part of a software system that potentially causes other components to fail; occurs most often in shared libraries of code used by multiple applications.

(Britain, idiomatic) Synonym of no chance or fat chance with a somewhat more cheerful attitude.

(pharmacology) A class of drug used to treat hypertension and also angina and arrhythmia.

plural of calcium channel blocker

The smaller of two channels in a river that diverge to form an island. / A secondary channel of activity, typically in parallel with primary channels and somewhat independent of them.

Alternative spelling of backchannel

(biology) A small pore in a cell membrane that is selective to potassium ions and has several regulatory functions.

In a changeable manner.

uncertain, risky, hazardous / subject to chance; random / (dated, colloquial) lucky; bringing good luck

The rank or post of a chancellor / The office or staff of a chancellor / The building in which such an office is situated