Search moccasin moccasin /mok′äsin/ , any of several species of snakes of the genus Agkistrodon. Water moccasin (John Willson at the Savannah River Ecology Laboratory [SREL]) Tweet Telegram VK Random Words conscience Medrol Acetate adenoiditis left hepatic duct aspiration pneumonia renal sclerosis osteochondrosis dissecans pes equinus cardiac asthma