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 p-aminobenzoate knot medullary chemoreceptor Rosenthal’s disease bronchial drainage expiration date ileoanal reservoir homogenous croup