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2 definitions found
From:
Webster's Revised Unabridged Dictionary (1913)
Or·cin
n.
Chem.
A
colorless
crystalline
substance
, C6H3.CH3.(OH)2,
which
is
obtained
from
certain
lichens
(
Roccella
,
Lecanora
,
etc
.),
also
from
extract
of
aloes
,
and
artificially
from
certain
derivatives
of
toluene
.
It
changes
readily
into
orcein
.
◄
►
From:
WordNet (r) 2.0
roccella
n
:
a
source
of
the
dye
archil
and
of
litmus
[
syn
: {
Roccella
tinctoria
]
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