Deltec or Deltaic: How To spell?

The word Deltec is misspelled against Deltaic, an adjective meaning "Relating to, or like, a delta."

Word contains consecutive vowels 'AI' in between alphabets delt & c is misspelled as 'E'
Wrong Spelling:  delt-e-c 
Correct Spelling:  delt-ai-c 
Explore spell check of Deltaic to spell without errors.

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