con·cave /kɑnˈkev, ˈkɑnˌ/
con·cave /kɑnˈkev, ˈkɑnˌ/ 形容詞
1. Hollow and curved or rounded; vaulted; -- said of the 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.
2. Hollow; void of contents. [R.]
As concave . . . as a worm-eaten nut. --Shak.
1. A hollow; an arched vault; a cavity; a recess.
Up to the fiery concave towering hight. --Milton.
2. Mech. A curved sheath or breasting for a revolving cylinder or roll.
Con·cave, v. t. [imp. & p. p. concaved p. pr. & vb. n. Concaving.] To make hollow or concave.
adj : curving inward [ant: convex]