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.
3. (Mach.) A lantern pinion or trundle wheel. See {Lantern
pinion} (below).
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}.
5. (Founding) A perforated barrel to form a core upon.
6. (Zo["o]l.) See {Aristotle's lantern}.
Note: 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.
{Dark lantern}, a lantern with a single opening, which may be
closed so as to conceal the light; -- called also
{bull's-eye}.
{Lantern fly}, {Lantern carrier} (Zo["o]l.), any one of
several species of large, handsome, hemipterous insects of
the genera {Laternaria}, {Fulgora}, and allies, of the
family {Fulgorid[ae]}. The largest species is {Laternaria
phosphorea} of Brazil. The head of some species has been
supposed to be phosphorescent.
{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} (Zo["o]l.), 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.