A phospholipase neurotoxin in the venom of Naja atra

(electronics) Automatic interchanging of connections to a digital meter when polarity is wrong; a minus sign appears ahead of the value on the digital display if the reading is negative.

(physics) Any of a series of electrodes within a photomultiplier tube.

Nominal governance by a dead person, through posthumous holding of an official position of authority, or by popular veneration and lasting influence of a personal ideology; necrocracy.