(Zool.) The five united jaws and accessory ossicles of certain sea urchins. [ 1913 Webster ]

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. [ wns=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. [ wns=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 ]

n. [ F. lanterne, L. lanterna, laterna, from Gr. lampth`r light, torch. See Lamp. ] 1. Something inclosing a light, and protecting it from wind, rain, etc.; -- sometimes portable, as a closed vessel or case of horn, perforated tin, glass, oiled paper, or other material, having a lamp or candle within; sometimes fixed, as the glazed inclosure of a street light, or of a lighthouse light. [ 1913 Webster ]

2. (Arch.) (a) An open structure of light material set upon a roof, to give light and air to the interior. (b) A cage or open chamber of rich architecture, open below into the building or tower which it crowns. (c) A smaller and secondary cupola crowning a larger one, for ornament, or to admit light; such as the lantern of the cupola of the Capitol at Washington, or that of the Florence cathedral. [ 1913 Webster ]

3. (Mach.) A lantern pinion or trundle wheel. See Lantern pinion (below). [ 1913 Webster ]

4. (Steam Engine) A kind of cage inserted in a stuffing box and surrounding a piston rod, to separate the packing into two parts and form a chamber between for the reception of steam, etc.; -- called also lantern brass. [ 1913 Webster ]

5. (Founding) A perforated barrel to form a core upon. [ 1913 Webster ]

6. (Zool.) See Aristotle's lantern. [ 1913 Webster ]

☞ Fig. 1 represents a hand lantern; fig. 2, an arm lantern; fig. 3, a breast lantern; -- so named from the positions in which they are carried. [ 1913 Webster ]

Dark lantern, a lantern with a single opening, which may be closed so as to conceal the light; -- called also bull's-eye. --
Lantern jaws, long, thin jaws; hence, a thin visage. --
Lantern pinion,
Lantern wheel (Mach.), a kind of pinion or wheel having cylindrical bars or trundles, instead of teeth, inserted at their ends in two parallel disks or plates; -- so called as resembling a lantern in shape; -- called also wallower, or trundle. --
Lantern shell (Zool.), any translucent, marine, bivalve shell of the genus Anatina, and allied genera. --
Magic lantern, an optical instrument consisting of a case inclosing a light, and having suitable lenses in a lateral tube, for throwing upon a screen, in a darkened room or the like, greatly magnified pictures from slides placed in the focus of the outer lens. [ 1913 Webster ]

v. t. [ imp. & p. p. Lanterned p. pr. & vb. n. Lanterning. ] [ Cf. F. lanterner to hang at the lamp post, fr. lanterne. See Lantern. ] To furnish with a lantern; as, to lantern a lighthouse. [ 1913 Webster ]

n. A small fish having rows of luminous organs along each side; some surface at night. [ WordNet 1.5 ]

n. (Zool.) any one of several species of large, handsome, brightly marked, tropical hemipterous insects of the genera Laternaria, Fulgora, and allies, of the family Fulgoridæ. The largest species is Laternaria phosphorea of Brazil. The head has a snoutlike process in some species which was formerly thought to emit a phosphorescent light. [ WordNet 1.5 ]

a. Having lantern jaws or long, thin jaws; as, a lantern-jawed person. [ 1913 Webster ]

n. An early form of slide projector. [ WordNet 1.5 ]