from The Century Dictionary and Cyclopedia
- n. A contrivance for preventing the access, as to a room, of the effluvia arising from drains and sinks.
- n. A reservoir and escape-valve placed at the joints or higher points of a water-main or pipe-line to allow the escape of air which may accumulate in the pipes.
- n. A small funnel of glass fastened in the inside of a barometer-tube to catch any bubbles of air that would otherwise rise through the mercury into the vacuum-chamber.
Sorry, no etymologies found.