Webster's Revised Unabridged Dictionary · 1913

Mephitic

Mephitic , adjective

[Latin mephiticus, from mephitis mephitis: compare French méphitique.]

1.
Tending to destroy life; poisonous; noxious; as, mephitic exhalations; mephitic regions.
2.
Offensive to the smell; as, mephitic odors.
Collocations (1)
Mephitic air (Chemistry) , carbon dioxide; -- so called because of its deadly suffocating power. See Carbonic acid, under Carbonic.

Also: Mephitical