(informal) An imaginary medicine taken when excessively anxious or upset about a trivial matter.

A drug, such as mifepristone (Mifegyne), used to terminate a pregnancy in its earliest stage.

(US) Any of very many terrestrial crustaceans, of the family Armadillidiidae, a subgroup of the woodlice, that can roll themselves up into a protective ball.

plural of sleeping pill

(pharmacology) A pill or tablet having a soporific effect.

plural of abortion pill

(figuratively) Ellipsis of bitter pill to swallow. / Used other than figuratively or idiomatically: see bitter, pill.

plural of chill pill

plural of pill bug

(Britain, slang) A tablet of the drug ecstasy.