gas maskˈgas mask noun [countable] 
a piece of equipment worn over your face to protect you from poisonous gases, especially during a war
a piece of equipment worn over your face to protect you from poisonous gases, especially during a war- St. Petersburg
- straddle
- strafe
- straggle
- straggler
- straggly
- straight
- straight angle
- straight-arm
- straight arrow
- straightaway
- straightedge
- straighten
- straightfaced
- straightforward
- straightforwardly
- straightforwardness
- straightjacket
- straight-laced
- straight man
- straight razor
- straight shooter
- straight ticket
- strain
- strained