Pidock or Piddock: How To spell?
The word Pidock is misspelled against Piddock, a noun meaning "Any species of Pholas; a pholad. See Pholas."
Piddock has double "dd" is mispronounced as "d"Remember double 'DD' in between the strings Pi & ock which should not be misspelled with single 'D'
Wrong Spelling:  Pi-d-ock  Correct Spelling:  Pi-dd-ock 
Find more incorrect spellings of Piddock to spell right way.