noun, plural emissaries.
a representative sent on a mission or errand: emissaries to negotiate a peace.
an agent sent on a mission of a secret nature, as a spy.
Anatomy. sending or coming out, as certain veins that pass through the skull and connect the venous sinuses inside with the veins outside.
pertaining to an emissary.
Archaic. sent forth, as on a mission.

1595–1605; < Latin ēmissārius one sent out, equivalent to ēmiss- (see emission) + -ārius -ary

1. delegate, ambassador, envoy, legate.
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World English Dictionary
emissary (ˈɛmɪsərɪ, -ɪsrɪ)
n , pl -saries
1.  a.  an agent or messenger sent on a mission, esp one who represents a government or head of state
 b.  (as modifier): an emissary delegation
2.  an agent sent on a secret mission, as a spy
3.  (of veins) draining blood from sinuses in the dura mater to veins outside the skull
[C17: from Latin ēmissārius emissary, spy, from ēmittere to send out; see emit]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

c.1600, from L. emissarius, lit. "that is sent out," from emissus, pp. of emittere "send forth" (see emit).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

emissary em·is·sar·y (ěm'ĭ-sěr'ē)
Any of various venous channels through the skull that connect the venous sinuses of the dura mater with veins external to the skull.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Reporters are meant to serve as emissaries between blinkered experts and
  broader society.
Comets are usually thought of as icy, dusty emissaries from the deepest reaches
  of the solar system.
They see themselves as emissaries of a national movement for whom everything is
But emissaries from the outside world occasionally reach them.
Related Words
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