| Omphalotus olearius (gcide)
 | Jack-o'-lantern \Jack"-o'-lan`tern\, Jack-with-a-lantern \Jack"-with-a-lan`tern\, n.
 1. (Biol.) A large orange-colored luminescent mushroom,
 Clitocybe illudens, also classified as {Omphalotus
 olearius}. It is poisonous and is sometimes found on
 hardwood tree stumps. [WordNet sense 1]
 
 Syn: jack-a-lantern, Clitocybe illudens.
 [WordNet 1.5 +PJC]
 
 2. a pale light sometimes seen at night over marshy ground;
 an ignis fatuus; a will-o'-the-wisp. [WordNet sense
 2]"[Newspaper speculations] supplying so many more
 jack-o'-lanterns to the future historian." --Lowell.
 
 Syn: friar's lantern, ignis fatuus, will-o'-the-wisp.
 [WordNet 1.5]
 
 3. A lantern carved from a hollowed-out pumpkin, with holes
 cut in the rind and so shaped that when it is illuminated
 by a candle inside, the features of a human face, cat's
 face, etc. appear in a glowing yellow color. It is used
 mostly as a decoration at Halloween.
 [WordNet 1.5 +PJC]
 |