acetaminophen: an analgesic for mild pain but not for inflammation; also used as an antipyretic; (Datril, Tylenol, Panadol, Phenaphen, Tempra, and Anacin III are trademarks of brands of acetaminophen tablets)
vent: a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt