Definition of "vortex-ring" [vortex-ring]

• See vortex. (noun)

The Century Dictionary (Public Domain)

• "It is suggested that an electric current going along a wire is such a "four-dimensional vortex-ring.""
• "Supposing, now, that we adopt provisionally the vortex theory, -- the great power of which is well shown by the consideration just mentioned, -- we must not forget that it is absolutely essential to the indestructibleness of the material atom that the universal fluid in which it has an existence as a vortex-ring should be entirely destitute of friction."
• "Now this is just what a vortex-ring would do in an incompressible frictionless fluid."