Gastreaa or Gastraea: How To spell?
The word Gastreaa is misspelled against Gastraea, a noun meaning "A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the Gastraea theory of Haeckel. See Gastrula."
Gastraea has vowels 'ae' together mispronounced as 'ea'Word contains consecutive vowels 'AE' in between alphabets gastr & a is misspelled as 'EA'
Wrong Spelling:  gastr-ea-a  Correct Spelling:  gastr-ae-a 
Explore spell check of Gastraea to spell without errors.