Glossaryflame spread February 26, 2024 Flaming combustion along a surface (not to be confused with the transfer of flame by air currents).
Glossaryflap trap February 26, 2024 In plumbing, a trap having a hinged flap which allows flow in one direction only, preventing backflow. trap
Glossaryflap door February 26, 2024 A small door, hinged horizontally along the bottom, that opens downward.
Glossaryflanker February 26, 2024 1. A dependency or a service wing on a side of a building. 2. From a recess in the side ramparts