Glōw'-wōrm, n.

(-wûrm), n. (Entom.) An insect (Lampyris noctiluca), of the order of Coleoptera. The female, which is wingless, emits, in the night-time, a shining green light from the extremity of the abdomen. The male is winged, and is supposed to be attracted by the light of the female.

Glow-worms. a, female; b, male.

Like a glow-worm in the night, The which hath fire in darkness, none in light. Shak.