All biconvex antonyms
bi·con·vex
B b adj biconvex
- concave — A surface that is concave curves inwards in the middle.
- sinking — to displace part of the volume of a supporting substance or object and become totally or partially submerged or enveloped; fall or descend into or below the surface or to the bottom (often followed by in or into): The battleship sank within two hours. His foot sank in the mud. Her head sinks into the pillows.
- depressed — If you are depressed, you are sad and feel that you cannot enjoy anything, because your situation is so difficult and unpleasant.