streamline

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To construct or design in a form that offers the least resistance to fluid flow.
• transitive verb To design with flowing, graceful lines.
• transitive verb To improve the efficiency of, often by simplification.
• noun A line that is parallel to the direction of flow of a fluid at a given instant.
• noun The path of one particle in a flowing fluid.
• noun A contour of a body constructed so as to offer minimum resistance to a fluid flow.

from The Century Dictionary.

• noun See line, and line of flow (under flow).

from the GNU version of the Collaborative International Dictionary of English.

• The path of a constituent particle of a flowing fluid undisturbed by eddies or the like.
• adjective Of or pert. to a stream line; designating a motion or flow that is free from turbulence, like that of a particle in a streamline; hence, designating a surface, body, etc., that is designed so as to afford an unbroken flow of a fluid about it, esp. when the resistance to flow is the least possible; ; -- the current usuage prefers the term streamlined.
• transitive verb to design or modify so as to present the least possible resistance to fluid flow; -- used mostly of vehicles, such as automobiles, airplanes, or ships.
• transitive verb to change so as to make more efficient; -- used especially of organizations, procedures, or methods.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun physics A line that is tangent to the velocity of flow of a fluid; equivalent to the path of a specific particle in that flow.
• noun meteorology On a weather chart, a line that is tangent to the flow of the wind.
• verb transitive To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
• verb transitive, by extension To simplify or organize a process in order to increase its efficiency.
• verb transitive To modernise.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb contour economically or efficiently