Imperforated :: Imperforated (a.) Not perforated; having no opening or aperture.
Imperforation :: Imperforation (n.) The state of being without perforation.
Perforata :: Perforata (n. pl.) A division of corals including those that have a porous texture, as Porites and Madrepora; -- opposed to Aporosa..
Perforata :: Perforata (n. pl.) A division of Foraminifera, including those having perforated shells..
Perforate :: Perforate (v.) To bore through; to pierce through with a pointed instrument; to make a hole or holes through by boring or piercing; to pierce or penetrate the surface of.