| omphalotus | (n) a genus of fungi with a depressed disc in the cap, Syn. genus Omphalotus |
| jack-o-lantern fungus | (n) a large poisonous agaric with orange caps and narrow clustered stalks; the gills are luminescent, Syn. Omphalotus illudens, jack-a-lantern, jack-o-lantern |