shells

n.

ammunition consisting of a cylindrical metal casing containing an explosive charge and a projectile; fired from a large gun

the material that forms the hard outer covering of many animals

hard outer covering or case of certain organisms such as arthropods and turtles

同义词：carapacecuticleshield

the hard usually fibrous outer layer of some fruits especially nuts

the exterior covering of a bird's egg

同义词：eggshell

a rigid covering that envelops an object

"the satellite is covered with a smooth shell of ice"

a very light narrow racing boat

同义词：racing shell

the housing or outer covering of something

同义词：casecasing

a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners)

同义词：platescale

the hard largely calcareous covering of a mollusc

Mineralogy of oxygen-rich dust shells.
Lanthanum complexes of spheroidal carbon shells
Singular hypersurfaces and thin shells in general relativity
Novel Hollow Polymer Shells by Colloid‐Templated Assembly of Polyelectrolytes
Self-Consistent Field Theory for Open Shells of Electronic Systems
Nonlinear finite element analysis of shells: Part I. three-dimensional shells
Interaction between the d-Shells in the Transition Metals. IV. The Intrinsic Antiferromagnetic Character of Iron
A kinetics and thermodynamics study of methylene blue adsorption on wheat shells
Epitaxial Growth and Photochemical Annealing of Graded CdS/ZnS Shells on Colloidal CdSe Nanorods
Large Elastic Deformations of Isotropic Materials. IX. The Deformation of Thin Shells