- a structural part resembling a small beam or crossbar.
- one of the projections from the cell wall that extends across the cavity of the ducts of certain plants, or the plate of cells across the cavity of the sporangium of a moss.
- any of various rod-shaped structures that divide organs into separate chambers
- any of various rod-shaped cells or structures that bridge a cavity, as within the capsule of a moss or across the lumen of a cell
