Dull; not reflective of light.
A decorative border around a picture used to inset and center the contents of a frame.
The molten metal sulfide phases typically formed during smelting of copper, nickel, and other base metals.
A background, often painted or created with computers
Less than normal.
denormal
A person whose abilities are less than normal.
That part of the axis of a curved line which is intercepted between the ordinate and the normal.