• Webster's Revised Unabridged Dictionary
    • a Three-valved Consisting of, or having, three valves; opening with three valves; as, a three-valved pericarp.
    • ***
Chambers's Twentieth Century Dictionary
    • Three-valved consisting of, or opening with, three valves
    • ***


Chambers's Twentieth Century Dictionary
A.S. þreó, þrý, þír; Ice. þrír, Gael. tri, Goth. threis, Ger. drei, L. tres, Gr. treis, Sans. tri.


In literature:

So the valve was opened rather freely, with the result that the balloon dropped a mile in three minutes.
"The Dominion of the Air" by J. M. Bacon
The capsule of the pansy expands into three valves, each scooped out like a boat and laden in the middle with two rows of seeds.
"The Life of the Spider" by J. Henri Fabre
Each valve has three folds, each half-moon-shaped, hence the name semilunar.
"A Practical Physiology" by Albert F. Blaisdell
In locomotive engines, the valve universally employed is the common three ported valve.
"A Catechism of the Steam Engine" by John Bourne
It opens by four valves more than halfway down when ripe, and contains the nuts, from one to three in number, in a downy cup.
"Among the Trees at Elmridge" by Ella Rodman Church
The triple valve has three duties to perform: Charge the auxiliary reservoir; apply the brake; and release the brake.
"The Traveling Engineers' Association" by Anonymous
The big three-valved balloons of the bladdernut can sail either in the air, on the water, or over the frozen snow.
"Some Winter Days in Iowa" by Frederick John Lazell
The three men dropped the lever, seized the wheel, and threw the valve wide open.
"The Best Short Stories of 1917" by Various
Three similar valves were found at the opening of the aorta into the left ventricle.
"The Great Events by Famous Historians, Volume 11" by Various
We know already in what positions our crank has to be at the opening and closing of the three valves, and with the aid of the diagram, fig.
"Gas and Oil Engines, Simply Explained" by Walter C. Runciman

In news:

Cartridge Valve Offered In Two- And Three-Way Models.
The three-way Characterized Control Valve (CCV) now offers expanded range with higher Cv ratings, Cv ratings comparable to globe valves, and a more cost-effective alternative.
Valve Software plans to release three episodes of "Half-Life 2" before deciding how to proceed with the series.
Valve Software plans to release three episodes of " Half-Life 2" before deciding how to proceed with the series.
Manually operated three or four-way spool valves have 1/4-in NPT ports for easy access, detented or momentary operation, and 0 to 150-psig pressure ranges, and operate at 32 to 140°F.
Wells said that oil stopped flowing into the water at 3:25 pm ET when the last of three valves in the 75-ton cap was slowly throttled shut.
AP Photo In this image taken from video provided by BP on Thursday, Oil flows from one of three valves of the new 75-ton cap atop the site of the Deepwater Horizon oil spill in the Gulf of Mexico.
ISA announced today that the organization has submitted three control valve standards to ANSI for approval as American National Standards.
Anderson's BV3-3A series three-piece sanitary ball valves meet 3A sanitary standards and feature sanitary connection ends for easy line removal.
They have the original caps and three of the valve stems are chrome.
They have the original caps and three of the valve stems are chrome .
News Valve Manufacturing Tyco Files Preliminary Proxy in Connection with Proposed Separation into Three Independent Companies.
Small valves (1/4-inch) and large valves (16-inch), two-way valves and three way valves.
The inspection sequence comprised 12 valve seats and three circular scans in each of 12 valve guide bores.
These valves can be used to hook three instruments together, as well as testing various gages and transmitters.

In science:

The three vacuum chambers are connected via two differential pumping stages, each consisting of a differential pumping tube as well as a gate valve.
An apparatus for immersing trapped ions into an ultracold gas of neutral atoms