eggshell /(?)/

egg·shell

eggshell

n.
  1. The shell or exterior covering of an egg. Also used figuratively for anything resembling an eggshell.
  2. A smooth, white, marine, gastropod shell of the genus Ovulum, resembling an egg in form. (Zoöl.)

eggshell

a.
  1. of a pale, yellowish-white color; as, an eggshell ceiling and light green walls.
  2. having a smooth but not glossy texture like that of a hen's egg; as, a latex paint giving an eggshell finish. Also referred to as matte glaze or non-lustrous glaze. (Architecture)