Tavtochrone or Tautochrone: How To spell?

The word Tavtochrone is misspelled against Tautochrone, a noun meaning "A curved line, such that a heavy body, descending along it by the action of gravity, will always arrive at the lowest point in the same time, wherever in the curve it may begin to fall; as, an inverted cycloid with its base horizontal is a tautochrone."

Word contains consecutive vowels 'AU' in between alphabets t & tochrone is misspelled as 'AV'
Wrong Spelling:  t-av-tochrone 
Correct Spelling:  t-au-tochrone 
Find more incorrect spellings of Tautochrone to spell right way.

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