ether 音标拼音: ['iθɚ]
n . 醚,大气,苍天,以太
醚,大气,苍天,乙太
ether n 1 :
the fifth and highest element after air and earth and fire and water ;
was believed to be the substance composing all heavenly bodies [
synonym : {
quintessence }, {
ether }]
2 :
any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom 3 :
a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves [
synonym :
{
ether }, {
aether }]
4 :
a colorless volatile highly inflammable liquid formerly used as an inhalation anesthetic [
synonym : {
ether }, {
ethoxyethane },
{
divinyl ether }, {
vinyl ether }, {
diethyl ether }, {
ethyl ether }]
Ether \
E "
ther \ ([=
e ]"
th [~
e ]
r ),
n . [
L .
aether ,
Gr .
a '
iqh `
r ,
fr .
a '
i `
qein to light up ,
kindle ,
burn ,
blaze ;
akin to Skr .
idh ,
indh ,
and prob .
to E .
idle :
cf .
F . ['
e ]
ther .] [
Written also {[
ae ]
ther }.]
1 . (
Physics )
A medium of great elasticity and extreme tenuity ,
once supposed to pervade all space ,
the interior of solid bodies not excepted ,
and to be the medium of transmission of light and heat ;
hence often called {
luminiferous ether }.
It is no longer believed that such a medium is required for the transmission of electromagnetic waves ;
the modern use of the term is mostly a figurative term for {
empty space },
or for literary effect ,
and not intended to imply the actual existence of a physical medium .
However .
modern cosmological theories based on quantum field theory do not rule out the possibility that the inherent energy of the vacuum is greater than zero ,
in which case the concept of an ether pervading the vacuum may have more than metaphoric meaning .
[
1913 Webster PJC ]
2 .
Supposed matter above the air ;
the air itself .
[
1913 Webster ]
3 . (
Chem .)
(
a )
A light ,
volatile ,
mobile ,
inflammable liquid ,
{(
C2H5 )
2O },
of a characteristic aromatic odor ,
obtained by the distillation of alcohol with sulphuric acid ,
and hence called also {
sulphuric ether }.
It is a powerful solvent of fats ,
resins ,
and pyroxylin ,
but finds its chief use as an an [
ae ]
sthetic .
Commonly called {
ethyl ether }
to distinguish it from other ethers ,
and also {
ethyl oxide }.
(
b )
Any similar compound in which an oxygen atom is bound to two different carbon atoms ,
each of which is part of an organic radical ;
as ,
amyl ether ;
valeric ether ;
methyl ethyl ether .
The general formular for an ether is {
ROR '},
in which R and R '
are organic radicals which may be of similar or different structure .
If R and R '
are different parts of the same organic radical ,
the structure forms a cyclic ether .
[
1913 Webster PJC ]
{
Complex ether }, {
Mixed ether } (
Chem .),
an ether in which the ether oxygen is attached to two radicals having different structures ;
as ,
ethyl methyl ether , {
C2H5 .
O .
CH3 }.
{
Compound ether } (
Chem .),
an ethereal salt or a salt of some hydrocarbon as the base ;
an ester .
{
Ether engine } (
Mach .),
a condensing engine like a steam engine ,
but operated by the vapor of ether instead of by steam .
[
1913 Webster ]
91 Moby Thesaurus words for "
ether ":
Caelus ,
Dry Ice ,
Freon ,
Olympian heights ,
Pentothal ,
acme ,
aerial heights ,
air ,
airy nothing ,
ammonia ,
apex ,
azure ,
blue sky ,
bubble ,
caelum ,
canopy ,
canopy of heaven ,
carbon dioxide ,
cerulean ,
chaff ,
chip ,
chloroform ,
cobweb ,
cocaine ,
coolant ,
cope ,
cork ,
dizzy heights ,
down ,
dust ,
elevation ,
eminence ,
empyrean ,
ethyl chloride ,
ethylene ,
fairy ,
feather ,
firmament ,
flue ,
fluff ,
foam ,
freezing mixture ,
froth ,
fuzz ,
gas ,
gossamer ,
heaven ,
heavens ,
height ,
heights ,
hyaline ,
ice ,
ice cubes ,
illusion ,
lift ,
lifts ,
liquid air ,
liquid helium ,
liquid oxygen ,
menthol ,
mist ,
mote ,
nitrous oxide ,
ozone ,
phantom ,
raise ,
refrigerant ,
rise ,
rising ground ,
shadow ,
sky ,
smoke ,
spirit ,
sponge ,
spume ,
starry heaven ,
steep ,
stratosphere ,
straw ,
the blue ,
the blue serene ,
thin air ,
thistledown ,
uprise ,
vantage ground ,
vantage point ,
vapor ,
vault ,
vault of heaven ,
welkin ,
zenith
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