火山弹

Volcanic \Vol*can"ic\, a. [Cf. F. volcanique, It. vulcanico.]
1. Of or pertaining to a volcano or volcanoes; as, volcanic
heat.

2. Produced by a volcano, or, more generally, by igneous
agencies; as, volcanic tufa.

3. Changed or affected by the heat of a volcano.

{Volcanic bomb}, a mass ejected from a volcano, often of
molten lava having a rounded form.

{Volcanic cone}, a hill, conical in form, built up of
cinders, tufa, or lava, during volcanic eruptions.

{Volcanic foci}, the subterranean centers of volcanic action;
the points beneath volcanoes where the causes producing
volcanic phenomena are most active.

{Volcanic glass}, the vitreous form of lava, produced by
sudden cooling; obsidian. See {Obsidian}.

{Volcanic mud}, fetid, sulphurous mud discharged by a
volcano.

{Volcanic rocks}, rocks which have been produced from the
discharges of volcanic matter, as the various kinds of
basalt, trachyte, scoria, obsidian, etc., whether compact,
scoriaceous, or vitreous.


Bomb \Bomb\, n. [F. bombe bombshell, fr. L. bombus a humming or
buzzing noise, Gr. ?.]
1. A great noise; a hollow sound. [Obs.]

A pillar of iron . . . which if you had struck,
would make . . . a great bomb in the chamber
beneath. --Bacon.

2. (Mil.) A shell; esp. a spherical shell, like those fired
from mortars. See {Shell}.

3. A bomb ketch.

{Bomb chest} (Mil.), a chest filled with bombs, or only with
gunpowder, placed under ground, to cause destruction by
its explosion.

{Bomb ketch}, {Bomb vessel} (Naut.), a small ketch or vessel,
very strongly built, on which mortars are mounted to be
used in naval bombardments; -- called also {mortar
vessel}.

{Bomb lance}, a lance or harpoon with an explosive head, used
in whale fishing.

{Volcanic bomb}, a mass of lava of a spherical or pear shape.
``I noticed volcanic bombs.'' --Darwin.