GLOWWORM, noun The female of the Lampyris noctiluca, an insect of the order of Coleopters. It is without wings and resembles a caterpillar. It emits a shining green light from the extremity of the abdomen. The male is winged and flies about in the evening, when it is attracted by the light of the female.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI