The word Bysoid is misspelled against Byssoid, an adjective meaning "Byssaceous."
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Byssoid has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings by & oid which should not be misspelled with single 'S'
Wrong Spelling:  by-s-oid 
Correct Spelling:  by-ss-oid 
Find more incorrect spellings of Byssoid to spell right way.