noctiluca

noun4

1. •
   Noctiluca scintillans (sea sparkle).
2. •
   (no longer used) A firefly, glowworm.

   • If a number of noctilucas are punctured with a needle, causing the cells to collapse, and are then subjected to an interrupted current, they respond just as uninjured cells do. — 1917
3. •
   (no longer used) A phosphorescent substance
4. •
   (no longer used) The moon