A more thorough explanation:

Definition: Mariticide is the act of killing one's husband. It can also refer to a woman who murders her husband. The term is also known as spousal homicide. The adjective form of mariticide is mariticidal.

• A woman was arrested for mariticide after she poisoned her husband's food.
• The police are investigating a case of mariticide where a man was found dead in his home.

These examples illustrate how mariticide refers to the act of killing one's husband. In the first example, a woman intentionally poisoned her husband, resulting in his death. In the second example, the cause of death is unknown, but the police suspect foul play and are investigating it as a case of mariticide.