tachocline

Meaning

Noun

A region of abrupt transition from rotation to convection in the interior of the sun.

Origin

tachy- + -cline
Coined in a paper by Edward A. Spiegel and Jean-Paul Zahn in 1992 (Spiegel, E. A.; & Zahn, J.-P.; "The solar tachocline", Astronomy and Astrophysics, 265, 106–114, 1992) by analogy to the oceanic thermocline.

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