sidereal
a . 星的,恒星的,以星球的运行为基准的
星的,恒星的,以星球的运行为基准的
sidereal adj 1 :
of or relating to the stars or constellations ; "
sidereal bodies "; "
the sidereal system "
2 : (
of divisions of time )
determined by daily motion of the stars ; "
sidereal time " [
ant : {
civil }]
Sidereal \
Si *
de "
re *
al \,
a . [
L .
sidereus ,
from sidus ,
sideris ,
a constellation ,
a star .
Cf . {
Sideral }, {
Consider }, {
Desire }.]
1 .
Relating to the stars ;
starry ;
astral ;
as ,
sidereal astronomy .
[
1913 Webster ]
2 . (
Astron .)
Measuring by the apparent motion of the stars ;
designated ,
marked out ,
or accompanied ,
by a return to the same position in respect to the stars ;
as ,
the sidereal revolution of a planet ;
a sidereal day .
[
1913 Webster ]
{
Sidereal clock }, {
day }, {
month }, {
year }.
See under {
Clock },
{
Day },
etc .
{
Sideral time },
time as reckoned by sideral days ,
or ,
taking the sidereal day as the unit ,
the time elapsed since a transit of the vernal equinox ,
reckoned in parts of a sidereal day .
This is ,
strictly ,
apparent sidereal time ,
mean sidereal time being reckoned from the transit ,
not of the true ,
but of the mean ,
equinoctial point .
[
1913 Webster ]
Month \
Month \ (
m [
u ^]
nth ),
n . [
OE .
month ,
moneth ,
AS .
m [=
o ]
n [
eth ],
m [=
o ]
na [
eth ];
akin to m [=
o ]
na moon ,
and to D .
maand month ,
G .
monat ,
OHG .
m [=
a ]
n [=
o ]
d ,
Icel .
m [=
a ]
nu [
eth ]
r ,
m [=
a ]
na [
eth ]
r ,
Goth .
m [=
e ]
n [=
o ][
thorn ]
s . [
root ]
272 .
See {
Moon }.]
One of the twelve portions into which the year is divided ;
the twelfth part of a year ,
corresponding nearly to the length of a synodic revolution of the moon , --
whence the name .
In popular use ,
a period of four weeks is often called a month .
[
1913 Webster ]
Note :
In the common law ,
a month is a lunar month ,
or twenty -
eight days ,
unless otherwise expressed .
--
Blackstone .
In the United States the rule of the common law is generally changed ,
and a month is declared to mean a calendar month . --
Cooley '
s Blackstone .
[
1913 Webster ]
{
A month mind }.
(
a )
A strong or abnormal desire . [
Obs .] --
Shak .
(
b )
A celebration made in remembrance of a deceased person a month after death . --
Strype .
{
Calendar months },
the months as adjusted in the common or Gregorian calendar ;
April ,
June ,
September ,
and November ,
containing 30 days ,
and the rest 31 ,
except February ,
which ,
in common years ,
has 28 ,
and in leap years 29 .
{
Lunar month },
the period of one revolution of the moon ,
particularly a synodical revolution ;
but several kinds are distinguished ,
as the {
synodical month },
or period from one new moon to the next ,
in mean length 29 d .
12 h .
44 m .
2 .
87 s .;
the {
nodical month },
or time of revolution from one node to the same again ,
in length 27 d .
5 h .
5 m .
36 s .;
the {
sidereal },
or time of revolution from a star to the same again ,
equal to 27 d .
7 h .
43 m .
11 .
5 s .;
the {
anomalistic },
or time of revolution from perigee to perigee again ,
in length 27 d .
13 h .
18 m .
37 .
4 s .;
and the {
tropical },
or time of passing from any point of the ecliptic to the same again ,
equal to 27 d .
7 h .
43 m .
4 .
7 s .
{
Solar month },
the time in which the sun passes through one sign of the zodiac ,
in mean length 30 d .
10 h .
29 m .
4 .
1 s .
[
1913 Webster ]
48 Moby Thesaurus words for "
sidereal ":
Cynthian ,
anagalactic ,
asteroidal ,
astral ,
astrologic ,
astrologistic ,
astrologous ,
astronomic ,
astrophysical ,
celestial ,
circumplanetary ,
cislunar ,
empyreal ,
empyrean ,
equinoctial ,
extragalactic ,
galactic ,
heavenly ,
heliacal ,
intercosmic ,
interplanetary ,
intersidereal ,
interstellar ,
lunar ,
lunary ,
lunate ,
lunular ,
lunulate ,
meteoric ,
meteoritic ,
nebular ,
nebulose ,
nebulous ,
planetal ,
planetarian ,
planetary ,
planetesimal ,
semilunar ,
solar ,
sphery ,
star -
spangled ,
star -
studded ,
starry ,
stellar ,
stellary ,
terrestrial ,
uranic ,
zodiacal
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:
Log into Facebook Email or mobile number Password
Facebook Facebook 155,272,921 likes · 275,524 talking about this Community Values We believe people can do more together than alone and that each of us plays an important role in helping to create a safe
Login and Password | Facebook Help Center Login and Password Find out what to do if you're having trouble logging in, or learn how to log out of Facebook
Manage what youve shared on Facebook | Facebook Help Center Your activity log lets you review and manage what you've shared on Facebook By default, it shows your activity from the current year, starting with your most recent activity
Log into your Facebook account | Facebook Help Center How to log into your Facebook account using your email, phone number or username
Account Recovery | Facebook Help Center Learn how to keep your account secure to prevent it from being hacked, or recover your account on a Meta platform in the Account Recovery Support Hub
Recover your Facebook account if you cant access your account email . . . This article is for people who are having problems logging into Facebook because they no longer have access to the email address or mobile phone number on their account If you can access your account email or phone, learn how to reset your password
Facebook Enter your mobile number or email Mobile number or email
Recover your Facebook account if you can’t log in If you can’t receive emails or text messages from us, maybe because you lost or upgraded your phone or your email account was hacked, learn how to recover your account if you can't access the email or phone number on your account
Facebook Connect your business, yourself or your cause to the worldwide community of people on Facebook To get started, choose a Page category