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bladder in botany, an inflated, hollow sac or float, as is found in certain seaweeds. [1/3 definitions]
buoy a float attached by line to the bottom of a body of water to mark a location. [3/5 definitions]
buoyancy the capacity to float or rise up in a liquid or gas. [1/2 definitions]
buoyant able to float or keep something else afloat. [1/3 definitions]
duckweed any of various flowering plants that float freely on ponds and slow streams.
float any of various objects that float on water, often used to buoy up something else. [1/14 definitions]
flotation any of several processes of separating and collecting various minerals from powdered ore, based on the minerals' ability to float in various liquids. [1/3 definitions]
fly1 to wave or float in the air, as a banner or kite. [2/12 definitions]
hang to be suspended or float in the air. [1/17 definitions]
hot-air balloon a bag made of thin material that is inflated with hot air, causing it to rise and float in the atmosphere. Large hot-air balloons can be attached to a basket or gondola, and used to transport people or equipment.
levitate to rise and float, apparently without hindrance from the force of gravity. [2 definitions]
outrigger an attached float extended on a frame to one side of a boat to provide added stability, as on seagoing canoes in the South Pacific. [1/2 definitions]
pontoon a float or boat used as support for a temporary floating bridge. [2 definitions]
Portuguese man-of-war a sea hydrozoan found in warm oceans, having a bladderlike sac that resembles a sail and allows it to float, and trailing many long stinging tentacles that may inflict severe injury.
raft1 a flat platform made of buoyant materials such as wood or air-filled barrels, designed to float and often to support or carry people or goods. [2/6 definitions]
refloat combined form of float.
ride of a heavenly body, to seem to float. [1/16 definitions]
rotameter an instrument that measures the rate of flow of a liquid by means of a movable float encased in a vertical tube.
sea anchor a large canvas-covered, often conical frame that is let out as a float or drag to prevent a ship from drifting off course or to keep it headed into the wind.
stream to float or wave. [1/10 definitions]
swim to float on water or other liquid. [2/10 definitions]