1 [mid]
being at or near the middle point of: in mid autumn.
being or occupying a middle place or position: in the mid nineties of the last century.
Phonetics. (of a vowel) articulated with an opening above the tongue relatively intermediate between those for high and low: the vowels of beet, bet, and hot are respectively high, mid, and low. Compare high ( def 23 ), low ( def 30 ).
Archaic. the middle.

before 900; Middle English, Old English midd- (both an adj. and the initial element of a compound; modern spellings such as mid autumn are probably a reanalysis of mid- as an adj.); cognate with Old High German mitti, Old Norse mithr, Gothic midjis, Old Irish mide, Latin medius, Greek mésos, Sanskrit madhya middle, OCS mežda limit, border

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World English Dictionary
mid1 (mɪd)
1.  phonetics of, relating to, or denoting a vowel whose articulation lies approximately halfway between high and low, such as e in English bet
2.  an archaic word for middle
[C12 midre (inflected form of midd, unattested); related to Old Norse mithr, Gothic midjis]

mid or 'mid2 (mɪd)
a poetic word for amid
'mid or 'mid2

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

O.E. mid, from P.Gmc. *medjaz (cf. O.N. miðr, O.S. middi, O.Fris. midde, O.H.G. mitti, Goth. midjis), from PIE *medhyo- (cf. Skt. madhyah, Gk. mesos, L. medius "middle;" see medial). Now surviving only as a prefix (midair, midstream, etc.); use as a preposition is often
aphetic use of amid (cf. midshipman).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

MID abbr.
minimal infecting dose

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
Abbreviations & Acronyms
  1. message identifier

  2. Military Intelligence Division

  3. minimal infecting dose

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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