The word 'streamline' is a modern compound, first used in the early 20th century within the field of fluid dynamics. It literally combines the concept of a smooth, uninterrupted 'stream' of fluid with the 'line' or contour of an object. The original, literal meaning described the teardrop shape that minimizes resistance when moving through a fluid. This powerful visual metaphor of efficient, smooth flow was then logically extended to abstract processes in business and administration, where the goal is to remove friction and obstructions to create a smooth, efficient progression.

Structure: stream (flow) + line (shape) - stream: From Old English strēam (a current of water, flow), of Germanic origin. - line: From Old English līne (a rope, series, row), from Latin līnea (linen thread, string).