borneol
n . 龙脑,冰片
龙脑,冰片
Borneol \
Bor "
ne *
ol \,
n . [
Borneo -
ol .] (
Chem .)
A rare variety of camphor , {
C10H17 .
OH },
resembling ordinary camphor ,
from which it can be produced by reduction .
It is said to occur in the camphor tree of Borneo and Sumatra ({
Dryobalanops camphora }),
but the natural borneol is rarely found in European or American commerce ,
being in great request by the Chinese .
Called also {
Borneo camphor }, {
Malay camphor },
and {
camphol }.
[
1913 Webster ]
Camphor \
Cam "
phor \ (
k [
a ^]
m "
f [~
e ]
r ),
n . [
OE .
camfere ,
F .
camphre (
cf .
It .
canfora ,
Sp .
camfora ,
alcanfor ,
LL .
canfora ,
camphora ,
NGr .
kafoyra `),
fr .
Ar .
k [=
a ]
f [=
u ]
r ,
prob .
fr .
Skr .
karp [=
u ]
ra .]
1 .
A tough ,
white ,
aromatic resin ,
or gum ,
obtained from different species of the {
Laurus }
family ,
esp .
from {
Cinnamomum camphara } (
the {
Laurus camphora }
of Linn [
ae ]
us .).
Camphor , {
C10H16O },
is volatile and fragrant ,
and is used in medicine as a diaphoretic ,
a stimulant ,
or sedative .
[
1913 Webster ]
2 .
originally ,
a gum resembling ordinary camphor ,
obtained from a tree ({
Dryobalanops aromatica }
formerly {
Dryobalanops camphora })
growing in Sumatra and Borneo ;
now applied to its main constituent ,
a terpene alcohol obtainable as a white solid {
C10H18O },
called also {
Borneo camphor }, {
Malay camphor }, {
Malayan camphor }, {
camphor of Borneo }, {
Sumatra camphor }, {
bornyl alcohol }, {
camphol },
and {
borneol }.
The isomer from {
Dryobalanops }
is dextrorotatory ;
the levoratatory form is obtainable from other species of plants ,
and the racemic mixture may be obtained by reduction of camphor .
It is used in perfumery ,
and for manufacture of its esters .
See {
Borneol }.
[
1913 Webster PJC ]
Note :
The name camphor is also applied to a number of bodies of similar appearance and properties ,
as {
cedar camphor },
obtained from the red or pencil cedar ({
Juniperus Virginiana }),
and {
peppermint camphor },
or {
menthol },
obtained from the oil of peppermint .
[
1913 Webster ]
{
Camphor oil } (
Chem .),
name variously given to certain oil -
like products ,
obtained especially from the camphor tree .
{
Camphor tree },
a large evergreen tree ({
Cinnamomum Camphora })
with lax ,
smooth branches and shining triple -
nerved lanceolate leaves ,
probably native in China ,
but now cultivated in most warm countries .
Camphor is collected by a process of steaming the chips of the wood and subliming the product .
[
1913 Webster ]
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