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Webster 1913 Edition

Vitreous

Vit′re-ous

,
Adj.
[L.
vitreous
, from
vitrum
glass; perhaps akin to
videre
to see (see
Vision
). Cf.
Varnish
.]
1.
Consisting of, or resembling, glass; glassy;
as,
vitreous
rocks
.
2.
Of or pertaining to glass; derived from glass;
as,
vitreous
electricity
.
Vitreous body
(Anat.)
,
the vitreous humor. See the Note under
Eye
.
–
Vitreous electricity
(Elec.)
,
the kind of electricity excited by rubbing glass with certain substances, as silk; positive electricity; – opposed to resinous, or negative, electricity.
–
Vitreous humor
.
(Anat.)
See the Note under
Eye
.
–
Vitreous sponge
(Zool.)
,
any one of numerous species of siliceous sponges having, often fibrous, glassy spicules which are normally six-rayed; a hexactinellid sponge. See
Venus’s basket
, under
Venus
.

Webster 1828 Edition

Vitreous

VIT'REOUS

,
Adj.
[L. vitreus, from vitrum, glass or woad.]
1.
Pertaining to glass.
2.
Consisting of glass; as a vitreous substance.
3.
Resembling glass; as the vitreous humor of the eye, so called from its resembling melted glass. [See Humor.]

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