ray

A narrow stream of radiant energy, especially visible light, traveling in a straight or nearly straight line.

A narrow stream of particles such as protons traveling in a straight or nearly straight line.

A rapidly moving particle traveling in a straight or nearly straight line.

Sunshine.

A small amount; a trace.

A straight line extending from a point.

A structure or part having the form of a straight line extending from a point, such as.

Any of the bright streaks that are seen radiating from some craters on the moon.

A ray flower or the strap-shaped portion of the corolla of a ray flower.