Prostracum or Proostracum: How To spell?

The word Prostracum is misspelled against Proostracum, a noun meaning "The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous. See Illust. of Phragmocone."

--> Proostracum has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings pr & stracum which should not be misspelled with single 'O'
Wrong Spelling:  pr-o-stracum 
Correct Spelling:  pr-oo-stracum 
Check more misspelled words of Proostracum to spell it correct.

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