A coarse, sponge-like form of elemental palladium that offers a large surface area for hydrogen adsorption and can be used as a catalyst for hydrogenation reactions.

plural of black durgon

Melichthys niger, a triggerfish with bright white lines running along its dorsal and anal fins.

Any species of Pseudechis, a genus of Australian snakes. / Crotalus oreganus, a venomous North American pit viper species of snake.

Having a black eye. / Having the iris of a black color. / as a part of a phrase

(medicine, historical) A narcotic preparation consisting essentially of a solution of opium in vinegar.

(obsolete) lampblack

(phytopathology) A disease of wheat, in which a black, moist substance is deposited in the fissures of the grain.

malignant anthrax with engorgement of a shoulder or quarter, etc., as of an ox

Any of several plant diseases causing the formation of dark cankers. / The larva of the turnip sawfly (Athalia rosae), an agricultural pest having the appearance of a black caterpillar.