bottlebrush

Definitions

• A cylindrical brush on a thin shaft that is used to clean bottles.
• Any of various trees or shrubs of the myrtle family, especially of the genera and Melaleuca, native to Australia and adjacent areas, having spikes of flowers with numerous conspicuous stamens.
• An uncommon cave formation resulting from a rise in water level such that a stalactite becomes immersed in water that is supersaturated with calcium carbonate, causing the stalactite to become coated with pool spar.