Definitions for "Concave"
Keywords:  inward, convex, curve, hollow, sphere
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.
Hollow; void of contents.
A hollow; an arched vault; a cavity; a recess.
Keywords:  skatey, scooping, slight, exit, rail
Design feature involving a slight scooping out of an area of the board, usually the bottom from rail to rail, during the shaping process. Concave is a paradox because it provides both lift (a skatey freeing up of the board) and drive (from pressure on the water along the exit rail). * see illustration
Design feature involving a slight scooping out of an area of the board, usually the bottom from rail to rail, during the shaping process. This gives the board both more lift (a skatey freeing up of the board) and drive (from pressure on the water along the exit rail)
Keywords:  sunken
Sunken in
Keywords:  contour, skater, deck, skate, tricks
The contour given to decks. The concave will dip down from the left to right and should be asymmetrical. Provides strength to the board and aids the skater when performing tricks.
The contour of a skate deck
The carving-out of a boomerang's lower side is a common technique to increase drag and keep a boomerang's flight low
pressure side of an airfoil.
Keywords:  adjective
adjective
Keywords:  ski, edge, channel, runs, down
the edge-to-edge channel that runs down the ski base.