door·mat 
(dôrmăt′)
(dôrmăt′)n.
1. A mat placed before a doorway for wiping the shoes.
2. Slang One who submits meekly to domination or mistreatment by others.
- linear equation
- linear independence
- linearity
- linearization
- linearize
- linearly
- linear measure
- linear momentum
- linear perspective
- linear transformation
- lineation
- linebacker
- linebacking
- line breeding
- linecaster
- linecasting
- line cut
- line dance
- line dancer
- line drawing
- line drive
- line engraving
- Line Islands
- line item
- line-item veto