Stair″case′ (@stâr″kās′), n. A flight of stairs with their supporting framework, casing, balusters, etc.
To make a complete staircase is a curious piece of architecture. Sir H. Wotton.
Staircase shell. (Zoöl.) (a) Any scalaria, or wentletrap. (b) Any species of Solarium, or perspective shell.