The word Pleochrous is misspelled against Pleochroous, an adjective meaning "Pleochroic."
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Pleochroous has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings pleochr & us which should not be misspelled with single 'O'
Wrong Spelling:  pleochr-o-us 
Correct Spelling:  pleochr-oo-us 
Check more misspelled words of Pleochroous to spell it correct.