Havstellum or Haustellum: How To spell?

The word Havstellum is misspelled against Haustellum, a noun meaning "The sucking proboscis of various insects. See Lepidoptera, and Diptera."

Word contains consecutive vowels 'AU' in between alphabets h & stellum is misspelled as 'AV'
Wrong Spelling:  h-av-stellum 
Correct Spelling:  h-au-stellum 
Check more misspelled words of Haustellum to spell it correct.

You might be interested to know

Inavspicious or Inauspicious?

Lavdative or Laudative?

Lavrite or Laurite?