\Glow"worm`\, n. (Zo["o]l.)
A coleopterous insect of the genus {Lampyris}; esp., the
wingless females and larv[ae] of the two European species
({L. noctiluca}, and {L. splendidula}), which emit light from
some of the abdominal segments.
      Like a glowworm in the night, The which hath fire in
      darkness, none in light.                 --Shak.
Note: The male is winged, and is supposed to be attracted by
      the light of the female. In America, the luminous
      larv[ae] of several species of fireflies and fire
      beetles are called glowworms. Both sexes of these are
      winged when mature. See {Firefly}.