of the nature of or resembling glass, as in transparency, brittleness, hardness, glossiness, etc.: vitreous china.
of or pertaining to glass.
obtained from or containing glass.

1640–50; < Latin vitreus, equivalent to vitr(um) glass + -eus -eous

vitreously, adverb
vitreousness, vitreosity [vi-tree-os-i-tee] , noun
subvitreous, adjective
subvitreously, adverb
subvitreousness, noun
unvitreosity, noun
unvitreous, adjective
unvitreously, adverb
unvitreousness, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vitreous (ˈvɪtrɪəs)
1.  of, relating to, or resembling glass
2.  made of, derived from, or containing glass
3.  of or relating to the vitreous humour or vitreous body
[C17: from Latin vitreus made of glass, from vitrum glass; probably related to vidēre to see]

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

1646, from L. vitreus "of glass, glassy," from vitreum "glass," which perhaps was so called for its color (cf. vitrium "woad").
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

vitreous vit·re·ous (vĭt'rē-əs)

  1. Of, relating to, resembling, or having the nature of glass; glassy.

  2. Of or relating to the vitreous body.

The vitreous body.
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
vitreous   (vĭt'rē-əs)  Pronunciation Key 
Relating to or resembling glass.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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