Glass: A Pocket Dictionary Of Terms Commonly Used - Corning ...

third centuries b.C., miniature core-formed oenochoes
were used as perfume bottles.
Omom (perhaps from Arabic qumqum, “sprinkler”):
A sprinkler with a tall, narrow neck and an oblate spheroid
body. Omoms were used in the islamic world for
sprinkling perfume.
Omphalos bowl (from Greek omphalos, “navel”):
A bowl with a hollow, raised boss (the “navel”) at
the center.
Opal glass: Glass that resembles an opal, being translucent
and white, with a grayish or bluish tinge.
Opalescent glass: (1) A type of late 19th-century Art
Glass, made by covering a gather of colored glass with
a layer of colorless glass containing bone ash and arsenic
or the mineral cryolite from Greenland. The parison was
inflated in a mold to produce raised decoration. When
the parison was reheated, the raised areas became
opalescent. (2) A type of glass resembling the iridescent
gemstone opal, which was developed by Frederick
Carder (1863–1963) at steuben Glass Works in Corning,
new york.
Openwork: Work that is perforated. openwork in glass
objects can be made by creating a network of trails, by
casting (see Diatreta), or by cutting (see Cage cup).
Optic mold: See Dip mold.
Optical glass: Glass of extreme purity and with welldefined
optical properties, which was originally created
for making lenses and prisms.
Opus sectile (from latin, “cut work”): Decoration on a
wall or floor, made by fitting together flat elements of
different shapes and colors. The ancient romans sometimes
used glass to make opus sectile ornament.
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