a valve controlling flow by means of a ball pierced with an opening in one direction and fixed to rotate on a spindle at right angles to the opening.
any valve that checks flow by the seating of a ball.
Near the bend is an outlet tube, c, provided with “ball valve” or pinch cock.
Scientific American Supplement, No. 508, September 26, 1885 Various
The plunger is loaded with a spiral spring, and has a ball valve, as shown.
Gas and Oil Engines, Simply Explained Walter C. Runciman
An overflow is provided, discharging into the open air to allow the water to escape should the ball valve become defective.
Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 Various
a one-way valve consisting of a metal ball with a cylindrical hole fitting into a concave seat over an opening
ball valve n.
A valve regulated by the position of a free-floating ball that moves in response to fluid or mechanical pressure.
- Ball washer
noun in golf, a device found near the tee of some holes on a course, used for cleaning dirt off of golf balls
- Ball clay
a fine dark kaolinic clay that turns white or nearly white when fired, used in the manufacture of a wide variety of ceramic wares in combination with other clays for its exceptional bonding properties and plasticity. Historical Examples The use of a ball clay is therefore limited in white wares because it will spoil the […]
- Ball, a
ball, a noun phrase An especially good time; a loud, funny party: The concert was a ball/ Man, we had us a ball (1930s+ Black college students)
- Ball’s in your court, the
It’s your responsibility now; it’s up to you. For example, I’ve done all I can; now the ball’s in your court. This term comes from tennis, where it means it is the opponent’s turn to serve or return the ball, and has been transferred to other activities. [ Second half of 1900s ]