Mephitic; Mephitical

Part of speech: adjective (a.)

1. Tending to destroy life; poisonous; noxious; as, mephitic exhalations; mephitic regions.

2. Offensive to the smell; as, mephitic odors. Mephitic air (Chem.), carbon dioxide; -- so called because of its deadly suffocating power. See Carbonic acid, under Carbonic.