SG Heritage Dictionary

Mephitic [Adjective] Webster's Dictionary 1828

1. Offensive to the smell; foul; poisonous; noxious; pestilential; destructive to life.

2. Mephitic acid is carbonic acid.

Mephitic [Adjective] Webster's Dictionary 1913

Mephitical [Adjective] Webster's Dictionary 1913

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

2. Offensive to the smell; as, mephitic odors.

Fetor Roget’s Thesaurus §401

V. have a bad smell, smell, stink, stink in the nostrils, stink like a polecat, smell strong, smell offensively

Adj. fetid, strong-smelling, high, bad, strong, fulsome, offensive, noisome, rank, rancid, reasty, tainted, musty, fusty, frouzy, olid, olidous|, nidorous, smelling, stinking, putrid, suffocating, mephitic, empyreumatic

Insalubrity Roget’s Thesaurus §657

N. insalubrity, unhealthiness, nonnaturals, plague spot, malaria, death in the pot, contagion, toxicity