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Related to indicia: indicium
1. Identifying marks; indications.
2. Markings on bulk mailings used as a substitute for stamps or cancellations.
[Latin, pl. of indicium, sign, from index, indic-, indicator; see index.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
pl n, sing -cium (-ʃɪəm)
distinguishing markings or signs; indications
[C17: from Latin, plural of indicium a notice, from index]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
in•di•ci•a(ɪnˈdɪʃ i ə)
n.pl., sing. -ci•um.
1. the legends or stamplike devices printed on postal stationery or bulk mail to indicate that postage has been paid.
2. distinctive marks.
[1615–25; < Latin, pl. of indicium disclosure, token, sign =indic-, s. of index (see index) + -ium]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.