(idiomatic) Strong emotion, either happy or sad, causing someone to be on the verge of crying.

(intransitive) To give off light, including in the invisible electromagnetic radiation frequencies, or become luminescent.

Not capable of producing light, but possibly capable of reflecting light from another source.

In photometry, the measure of the power of light as perceived by the human eye, in proportion to the power at each wavelength.

(astronomy) That emits significant amounts of radio waves; radio-bright.

A shirt of flannel or similar material with a plaid pattern, traditionally worn by lumberjacks.

plural of lumberjack shirt

plural of luma

plural of lumachel

(geology) A grey form of limestone that contains fossil shells, and reflects a fiery play of colours