1. a wingless female firefly or the larva of a firefly that produces a greenish light

Examples

• The children were delighted to find glowworms in the garden at dusk.
• Glowworms use their light to attract mates in the darkness.
• We spotted several glowworms glowing softly under the hedge.
• The glowworm’s bioluminescence creates a magical effect in the night.
• Unlike flying fireflies, glowworms remain on the ground or in vegetation.
• The cave was illuminated by hundreds of tiny glowworms on the ceiling.