Noun

(en noun)

(particle) A massless gauge boson that binds quarks together to form baryons, mesons and other hadrons and is associated with the strong nuclear force.

Noun

(en noun)

(particle) The quantum of light and other electromagnetic energy, regarded as a discrete particle having zero rest mass, no electric charge, and an indefinitely long lifetime. It is a gauge boson.

* {{quote-magazine, year=2013, month=July-August, author= Fenella Saunders

, title= Tiny Lenses See the Big Picture, magazine=(American Scientist) , passage=The single-imaging optic of the mammalian eye offers some distinct visual advantages. Such lenses can take in photons from a wide range of angles, increasing light sensitivity. They also have high spatial resolution, resolving incoming images in minute detail.}}