camphol
n . 龙脑
龙脑
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 ]
Camphol \
Cam "
phol \,
n . [
Camphor -
ol .] (
Chem .)
See {
Borneol }.
[
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 ]
安装中文字典英文字典查询工具!
中文字典英文字典工具:
复制到剪贴板
英文字典中文字典相关资料:
Height Converter - cm, meters, feet and inches - The Calculator Site Calculate your height in cm or feet and inches using our height converter and chart, with conversion for imperial and US units to metric units
CM to Feet+Inches (ft+in) Converter - RapidTables. com Centimeters (cm) to Feet+inches (ft+in) conversion calculator and how to convert
Cm to ft in Converter - Centimeters to Feet and Inches Free cm to ft in converter turns centimeters into feet and inches and back, with total inches, decimal feet, and meter context for height and length
Convert cm to feet – Instant Accurate Tool Instantly convert centimeters to feet with our free and easy-to-use converter Includes formula, table, definitions, and FAQ
Centimeters to Feet and Inches Calculator - CoolConversion Convert cm to feet and inches instantly Get results in decimal and fractional formats Ideal for height, carpentry and construction
How to Convert cm to Feet and Inches (With Examples) Step-by-step guide to converting centimeters to feet and inches, with common height examples like 170 cm, 175 cm, and 180 cm
CM to Feet and Inches | CM to Ft Length Converter - Calculator Suite Convert cm to feet and inches instantly Use this free cm to ft calculator — enter the length in centimeters and get the exact result in feet and inches
Convert Centimeters to Feet - CalculateMe. com Use this easy and mobile-friendly calculator to convert between centimeters and feet Just type the number of centimeters into the box and hit the Calculate button
Centimeters To Feet Converter | cm To ft Converter You can use the Centimeters to Feet unit converter to convert from one measurement to another To start simply enter Centimeter or Foot into the correct box below
CM to Feet Calculator – Convert Centimeters to Feet and Inches Instantly cm to feet calculator instantly converts any height or length from centimeters into feet and inches It provides accurate results for daily use from body height to furniture and design measurements