banner vane
A weather vane having the shape of a banner; balanced by a weight on the other side of the banner.
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General
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back fillet
The return of the margin of a groin, doorjamb, or window jamb when it projects beyond a wall.
General
backwater valve, backflow valve
A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off
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bacterial corrosion
A corrosion which results from substances (e.g., ammonia or sulfuric acid) produced by the activity of certain bacteria
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badger plane
A hand plane, the mouth of which is cut obliquely from side to side, so that it can work close