A means of execution or of euthanasia in which a person is injected with a fatal dose of drugs.

plural of lethal injection

(biology) A quiescent sleeplike state in some arthropods and nematodes.

Not capable of causing death. / Designed to cause incapacitation without causing death.

Any weapon that incapacitates without causing death.

plural of lethargy

(genetics) A type of genetic interaction in which two (or more) mutations which are not lethal when occurring singly in a cell are lethal when they occur together in the same cell.

plural of lethality

(archaic) lethargic

The quality of being lethargic.