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e shell or exterior covering of an egg. Also used figuratively for anything resembling an eggshell.

Calciferous. Specifically: (Zoöl.) of or pertaining to hte portion of the which forms the eggshell in birds and reptiles. Huxley.

Lit., an eggshell; hence, an eggshell filled with confetti to be thrown during balls, carnivals, etc. [Western U. S.]

To break or crack, or crack off a portion of, as of an eggshell in hatching, or a piece of crockery.

e interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex; as, a concave mirror; the concave arch of the sky.

Concave on one side and convex on the other, as an eggshell or a crescent.

broken down or in, or pressed into a smaller compass, by external weight or force; as, an eggshell crushes easily.

rance; foolish; silly. His shipping, Poor ignorant baubles! -- on our terrible seas, Like eggshells moved. Shak.

dimentary shell is formed in embryonic mollusks. (b) A glandular organ which secretes the eggshells of various worms, crustacea, mollusks, etc. -- Shell gun, a cannon suitable for throwing shells. -- Shell ibis (Zoöl.), the openbill of India. -- Shell jacket, an undress military jacket. -- Shell lime, lime made by…