'eggshell' is a correct and usable word in written English.
It refers to the brittle, thin outer layer of a bird's egg. Example sentence: "The eggshell was very fragile and easily broken."
Bath painted in Goldfinch eggshell, £19.75 for 750ml.
Viewed from the side, its occupants sit within a fragile eggshell of fibreglass.
He is an aspect of Henry V, an aspect of Caesar, above all, he is young Fortinbras in "Hamlet", leading his 20,000 men to their deaths "even for an eggshell".
It slashes its way out of the rubbery eggshell with this tooth or, in the case of the live-born, cuts its way out of the soft membranes and is instantly competent to cope with its surroundings.
In direct contact with the eggshell of reptiles and birds, this chorioallantoic membrane absorbs oxygen through the porous shell from the atmosphere for nourishment of the embryo; it also discharges waste carbon dioxide through the shell.
There are a few crabs, especially those living in fresh water, that do not pass through a series of free-living larval stages but instead leave the eggshell as miniature adults.
These birds are in our skies only because we want them to be: their successes the result of reintroduction programmes (in the case of the red kite) and a slower, natural recovery following the outlawing of persecution and eggshell-thinning pesticides.
Along with pastoralism and pottery came other signs of change: domestic dogs, changes in stone tool kits, altered settlement patterns, larger ostrich-eggshell beads, and the appearance of marine shells in the interior, which suggests the existence of long-distance trade.
Nevertheless, the appearance of cave art, careful burials, and ostrich-eggshell beads for adornment suggests more sophisticated behaviour and new patterns of culture.
On top, an eggshell-blue Forties coat with fur-trimmed cuffs, and a scarlet beret.
A grittier breading, almost eggshell-like, covering a pungent dry-fried catfish, is no less successful.
