one of several parallel sloping beams that support a roof | long thick piece of wood or metal or concrete, etc., used in construction |
something immaterial that interferes with or delays action or progress | a gymnastic apparatus used by women gymnasts |
the area on a billiard table behind the balkline | the broad side of a ship |
| (nautical) breadth amidships |
| a signal transmitted along a narrow path; guides airplane pilots in darkness or bad weather |
| a column of light (as from a beacon) |
| a group of nearly parallel lines of electromagnetic radiation |