[proh-tuh-kawl, -kol, -kohl]
the customs and regulations dealing with diplomatic formality, precedence, and etiquette.
an original draft, minute, or record from which a document, especially a treaty, is prepared.
a supplementary international agreement.
an agreement between states.
an annex to a treaty giving data relating to it.
Medicine/Medical. the plan for carrying out a scientific study or a patient's treatment regimen.
Computers. a set of rules governing the format of messages that are exchanged between computers.
Also called protocol statement, protocol sentence, protocol proposition. Philosophy. a statement reporting an observation or experience in the most fundamental terms without interpretation: sometimes taken as the basis of empirical verification, as of scientific laws.
verb (used without object)
to draft or issue a protocol.

1535–45; earlier protocoll < Medieval Latin prōtocollum < Late Greek prōtókollon orig., a leaf or tag attached to a rolled papyrus manuscript and containing notes as to contents. See proto-, colloid

protocolar [proh-tuh-kol-er] , protocolary, protocolic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
protocol (ˈprəʊtəˌkɒl)
1.  the formal etiquette and code of behaviour, precedence, and procedure for state and diplomatic ceremonies
2.  a memorandum or record of an agreement, esp one reached in international negotiations, a meeting, etc
3.  chiefly US
 a.  a record of data or observations on a particular experiment or proceeding
 b.  an annexe appended to a treaty to deal with subsidiary matters or to render the treaty more lucid
 c.  a formal international agreement or understanding on some matter
4.  an amendment to a treaty or convention
5.  philosophy See logical positivism In full: protocol statement a statement that is immediately verifiable by experience
6.  computing the set form in which data must be presented for handling by a particular computer configuration, esp in the transmission of information between different computer systems
[C16: from Medieval Latin prōtocollum, from Late Greek prōtokollon sheet glued to the front of a manuscript, from proto- + kolla glue]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1540s, as prothogall "draft of a document," from M.Fr. prothocole (c.1200), from M.L. protocollum "draft," lit. "the first sheet of a volume" (on which contents and errata were written), from Gk. protokollon "first sheet glued onto a manuscript," from protos "first" + kolla "glue." Sense developed in
M.L. and M.Fr. from "official account" to "official record of a transaction," "diplomatic document," and finally, in Fr., to "formula of diplomatic etiquette." Meaning "diplomatic rules of etiquette" first recorded 1896, from French; general sense of "conventional proper conduct" is from 1952. "Protocols of the (Learned) Elders of Zion," Rus. anti-Semitic forgery purporting to reveal Jewish plan for world domination, first published in English 1920 under title "The Jewish Peril."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

protocol pro·to·col (prō'tə-kôl', -kōl')
The plan for a course of medical treatment or for a scientific experiment.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
protocol   (prō'tə-kôl', -kōl')  Pronunciation Key 
  1. The plan for a course of medical treatment or for a scientific experiment.

  2. A set of standardized procedures for transmitting or storing data, especially those used in regulating data transmission between computers or peripherals.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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