streamline

Etymology

stream + line

noun

1. (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.
2. (meteorology) On a weather chart, a line that is tangent to the flow of the wind.

verb

1. (transitive) To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
2. (transitive, by extension) To simplify or organize a process in order to increase its efficiency.
3. (transitive) To modernise.