半径 — meaning in English

bàn jìng

English meaning

beam noun A long, sturdy length of wood, steel, or concrete used to support a structure such as a floor, roof, or ship deck.
radius noun A straight line from the center of a circle or sphere to its edge, or the length of that line.
ray noun A narrow beam of light or other radiation.
shaft noun A long, narrow, straight part of a tool, weapon, or machine — such as a handle, pole, or rotating rod that transmits power.
thunderbolt noun A flash of lightning together with the crash of thunder that comes with it.

半径 is used for these senses in English:

beam (physics) A ray or collection of approximately parallel rays emitted from the sun or other luminous body.
radius (geometry) The length of this line segment.
ray (mathematics) A line extending indefinitely in one direction from a point.
shaft (literary) A beam or ray of light.
thunderbolt A flash of lightning accompanied by a crash of thunder.

noun A long, sturdy length of wood, steel, or concrete used to support a structure such as a floor, roof, or ship deck.
noun A ray or narrow stream of light.
noun A wide, happy smile.
verb To smile broadly and happily.
verb To send out light, or to transmit signals or data wirelessly.

noun A straight line from the center of a circle or sphere to its edge, or the length of that line.
noun A surrounding area or distance measured from a central point.
noun The long bone of the forearm on the thumb side.