stream·line 
(strēmlīn′)
(strēmlīn′)tr.v. stream·lined, stream·lin·ing, stream·lines
1.
a. To construct or design in a form that offers the least resistance to fluid flow: streamline a car's design.
b. To design with flowing, graceful lines: streamline furniture.
2. To improve the efficiency of, often by simplification: streamline a factory process.
n.
1. A line that is parallel to the direction of flow of a fluid at a given instant.
2. The path of one particle in a flowing fluid.
3. A contour of a body constructed so as to offer minimum resistance to a fluid flow.