Definition that contains gas pressure
- bar a portable .30 caliber automatic rifle operated by gas pressure and fed by cartridges from a magazine; used by United States troops in World War I and in World War II and in the Korean War
- bren a submachine gun operated by gas pressure; used by the British in World War II
- semirigid having a form maintained by a rigid internal structure as well as by internal gas pressure
- nonrigid designating an airship having a shape maintained only by internal gas pressure and without a supporting structure
- browning automatic rifle a portable .30 caliber automatic rifle operated by gas pressure and fed by cartridges from a magazine; used by United States troops in World War I and in World War II and in the Korean War
- henry's law (chemistry) law formulated by the English chemist William Henry; the amount of a gas that will be absorbed by water increases as the gas pressure increases
- bren gun a submachine gun operated by gas pressure; used by the British in World War II