an explosive surge in a fire produced by the sudden mixing of air with other combustible gases.
a sweep of air backwards; also, a condition in a fire where oxygen is depleted and the fire dies down until a door is opened and the fire flares violently from the intake of oxygen
- Back down
the rear part of the human body, extending from the neck to the lower end of the spine. the part of the body of animals corresponding to the human back. the rear portion of any part of the body: the back of the head. the whole body, with reference to clothing: the clothes on his […]
- Drawing board
a rectangular board on which paper is placed or mounted for drawing or drafting. back to the drawing board, back to the original or an earlier stage of planning or development: Our plan didn’t work out, so it’s back to the drawing board. on the drawing board, in the planning or design stage: The shopping […]
Also called, especially British, back-cloth. Theater. the rear curtain of a stage setting. the background of an event; setting. Gymnastics. a maneuver in which a trampolinist jumps in the air, lands on the back with the arms and legs pointed upward, and then springs up to a standing position. to provide a setting or background […]
- Back electromotive force
counter electromotive force.