Tetrahedraly or Tetrahedrally: How To spell?
The word Tetrahedraly is misspelled against Tetrahedrally, an adverb meaning "In a tetrahedral manner."
Tetrahedrally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings tetrahedra & y which should not be misspelled with single 'L'
Wrong Spelling:  tetrahedra-l-y  Correct Spelling:  tetrahedra-ll-y 
Explore spell check of Tetrahedrally to spell without errors.