from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An airtight chamber, usually located between two regions of unequal pressure, in which air pressure can be regulated.
- n. A bubble or pocket of air or vapor, as in a pipe, that stops the normal flow of fluid through the conducting part.
from the GNU version of the Collaborative International Dictionary of English
- n. an intermediate chamber between the outer air and the compressed-air chamber of a pneumatic caisson.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a chamber that provides access to space where air is under pressure
Sorry, no etymologies found.
Kahvi knew of an air lock on this side of Hemenway, and was making their way toward it.
Again, happily, automatic machinery took care of the freezing and dumping of these wastes through a channel leading to an air lock in the unpressurized section aft.
As had been agreed, Zhamia and Genda went at once to the air lock with their supplies of nitrogen producers, while Mort,
But the attack on the air lock had been only a decoy — on the far side of the ship, a cargo hold opened suddenly, and a string of space-armored bodies drifted into it.
The air lock opened into a cave about fifty meters wide and long, and five or six high-the roof was far from even.
The air lock went through its cycle, replacing most of the human-scented air with a purer oxygen/nitrogen mix, signaling ready after perhaps thirty seconds.
The first shuttle load of Mackensee personnel that eased up to Vanguard’s larger air lock swam the tube with helmets sealed.