mephobarbital: a long-acting crystalline barbiturate (trade name Mebaral) used as a sedative and as an anticonvulsant in the treatment of epilepsy
barbiturate: organic compound having powerful soporific effect; overdose can be fatal
branchiobdella: type genus of the Branchiobdellidae: a small worm that lives on the gills or surface of a crayfish attached by a sucker