\Stream"line`\, a.
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;
as, a streamline body for an automobile or airship.