Found 1 items, similar to helmet shell.
English → English (gcide)
Definition: Helmet shell
Helmet
\Hel"met\, n. [OF. helmet, a dim of helme, F. heaume; of
Teutonic origin; cf. G. helm, akin to AS. & OS. helm, D.
helm, helmet, Icel. hj[=a]lmr, Sw. hjelm, Dan. hielm, Goth.
hilms; and prob. from the root of AS. helan to hide, to hele;
cf. also Lith. szalmas, Russ. shleme, Skr. [,c]arman
protection. [root]17. Cf.
Hele,
Hell,
Helm a helmet.]
1. (Armor) A defensive covering for the head. See
Casque,
Headpiece,
Morion,
Sallet, and Illust. of
Beaver.
[1913 Webster]
2. (Her.) The representation of a helmet over shields or
coats of arms, denoting gradations of rank by
modifications of form.
[1913 Webster]
3. A helmet-shaped hat, made of cork, felt, metal, or other
suitable material, worn as part of the uniform of
soldiers, firemen, etc., also worn in hot countries as a
protection from the heat of the sun.
[1913 Webster]
4. That which resembles a helmet in form, position, etc.; as:
(a) (Chem.) The upper part of a retort. --Boyle.
(b) (Bot.) The hood-formed upper sepal or petal of some
flowers, as of the monkshood or the snapdragon.
(c) (Zo["o]l.) A naked shield or protuberance on the top
or fore part of the head of a bird.
[1913 Webster]
Helmet beetle (Zo["o]l.), a leaf-eating beetle of the
family
Chrysomelid[ae], having a short, broad, and
flattened body. Many species are known.
Helmet shell (Zo["o]l.), one of many species of tropical
marine univalve shells belonging to
Cassis and allied
genera. Many of them are large and handsome; several are
used for cutting as cameos, and hence are called
cameo shells
. See
King conch.
Helmet shrike (Zo["o]l.), an African wood shrike of the
genus
Prionodon, having a large crest.
[1913 Webster]