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A sleeved outer vestment reaching to the knees, worn over the alb by a subdeacon or sometimes under the dalmatic by a bishop or cardinal. Also called tunic.
[Middle English, from Latin tunicula, diminutive of tunica, tunic; see tunic.]
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.
(Roman Catholic Church) chiefly RC Church the liturgical vestment worn by the subdeacon and bishops at High Mass and other religious ceremonies
[C14: from Latin tunicula a little tunic]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
tu•ni•cle(ˈtu nɪ kəl, ˈtyu-)
a vestment worn over the alb by subdeacons, as at the celebration of the Mass, and by bishops.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.