SMOKERING

Smoke ring

A smoke ring is a visible vortex ring formed by smoke in a clear atmosphere. Smokers may blow smoke rings from the mouth, intentionally or accidentally. Smoke rings may also be formed by sudden bursts of fire, by shaking a smoke source up and down, by firing certain types of artillery, or by the use of special devices, such as vortex ring toys. The head of a mushroom cloud is a large smoke ring.

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smoke ring

Noun

  1. A smoking trick where one blows or exhales rings of smoke.
    A smoke ring persists for a surprisingly long time, illustrating the slow rate at which viscosity dissipates the energy of a vortex.


The above text is a snippet from Wiktionary: smoke ring
and as such is available under the Creative Commons Attribution/Share-Alike License.

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