Webster's English Dictionary

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protocol

pro.to.col \'pro-t-*-.ko.l, -.ko-l, -.ka:l, -k*l\ n [MF prothocole, fr. ML 
   protocollum, fr. LGk pro-tokollon f]irst sheet of a papyrus roll bearing 
   data of manufacture, fr. Gk pro-t- prot- + kollan to glue together, fr. 
   kolla glue; akin to MD helen to glue 1: an original draft, minute, or 
   record of a document or transaction  2a: a preliminary memorandum of 
   diplomatic negotiation  2b: the records or minutes of a diplomatic 
   conference or congress  3: a code of diplomatic or military etiquette and 
   precedence