shell

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Related to shelled: shelled out

shell

(shel),
An outer covering.

shell

Etymology: AS, scell
1 a hard outer protective covering that encloses material.
2 a principal energy level occupied by an electron in an atom.

shell

(shel)
An outer covering.

shell

any hard outer covering, such as the carapace of turtles and tortoises, the exoskeleton of crustaceans, the calcareous plates of echinoderms, the outermost membranes of an egg, the skeleton of Foraminifera or the mantle secretions of molluscs.

impression, eye

A negative form or replica of the anterior part of the eye. A substance with rapid gelling properties is held in contact with the eye until gelled. This impression (or mould) is then used in the preparation of a positive model called a cast (or casting) of the anterior part of the eye: it is made by filling the impression with a material containing a plaster of Paris base which hardens to artificial stone. Using this cast a shell of a scleral contact lens is produced with optimum shape of the back surface. Syn. impression; impression moulding; mould; ocular impression.
References in classic literature ?
Olson told him of how the Germans had returned and waited in ambush for them outside the fort, capturing them that they might be used to assist in the work of refining the oil and later in manning the U-33, and Plesser told briefly of the experiences of the German crew under von Schoenvorts since they had escaped from Caspak months before--of how they lost their bearings after having been shelled by ships they had attempted to sneak farther north and how at last with provisions gone and fuel almost exhausted they had sought and at last found, more by accident than design, the mysterious island they had once been so glad to leave behind.
I don't know what I wouldn't sooner have had happen," thought Marilla, as she nervously shelled the peas.
The tree indicated that the common ancestor of the seven species was left shelled.