Synalaxine or Synallaxine: How To spell?
The word Synalaxine is misspelled against Synallaxine, an adjective meaning "Having the outer and middle toes partially united; -- said of certain birds related to the creepers."
Synallaxine has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings syna & axine which should not be misspelled with single 'L'
Wrong Spelling:  syna-l-axine  Correct Spelling:  syna-ll-axine 
Find more wrongly spelled words of Synallaxine to spell it well.