periodical 音标拼音: [p
, ɪri'ɑdɪkəl]
n . 期刊
a . 周期的,定期的
期刊周期的,定期的
periodical 周期
periodical adj 1 :
happening or recurring at regular intervals ; "
the periodic appearance of the seventeen -
year locust " [
synonym :
{
periodic }, {
periodical }] [
ant : {
aperiodic },
{
nonperiodic }]
n 1 :
a publication that appears at fixed intervals Periodic \
Pe `
ri *
od "
ic \ (
p [=
e ]`
r [
i ^]*[
o ^]
d "[
i ^]
k ),
Periodical \
Pe `
ri *
od "
ic *
al \ (
p [=
e ]`
r [
i ^]*[
o ^]
d "[
i ^]*
kal ),
a . [
L .
periodicus ,
Gr .
periodiko `
s :
cf .
F .
p ['
e ]
riodique .]
1 .
Of or pertaining to a period or periods ,
or to division by periods .
[
1913 Webster ]
The periodical times of all the satellites . --
Sir J .
Herschel .
[
1913 Webster ]
2 .
Performed in a period ,
or regular revolution ;
proceeding in a series of successive circuits ;
as ,
the periodical motion of the planets round the sun .
[
1913 Webster ]
3 .
Happening ,
by revolution ,
at a stated time ;
returning regularly ,
after a certain period of time .
[
1913 Webster ]
The periodic return of a plant '
s flowering .
--
Henslow .
[
1913 Webster ]
To influence opinion through the periodical press .
--
Courthope .
[
1913 Webster ]
4 .
Acting ,
happening ,
or appearing ,
at fixed or somewhat variable intervals ;
recurring ;
as ,
periodical epidemics [
1913 Webster ]
5 . (
Rhet .)
Of or pertaining to a period ;
constituting a complete sentence .
[
1913 Webster ]
{
Periodic comet } (
Astron .),
a comet that moves about the sun in an elliptic orbit ;
a comet that has been seen at two of its approaches to the sun .
{
Periodic function } (
Math .),
a function whose values recur at fixed intervals as the variable uniformly increases .
The trigonomertic functions ,
as sin (
x ),
tan (
x ),
etc .,
are periodic functions .
Exponential functions are also periodic ,
having an imaginary period ,
and the elliptic functions have not only a real but an imaginary period ,
and are hence called doubly periodic .
{
Periodic law } (
Chem .),
the generalization that the properties of the chemical elements are periodic functions of their atomic weights . "
In other words ,
if the elements are grouped in the order of their atomic weights ,
it will be found that nearly the same properties recur periodically throughout the entire series ."
The following tabular arrangement of the atomic weights shows the regular recurrence of groups (
under I .,
II .,
III .,
IV .,
etc .),
each consisting of members of the same natural family .
The gaps in the table indicate the probable existence of unknown elements .
{
Periodic table }, {
Periodic table of the elements } (
Chem .),
A tabular arrangement of the chemical elements ,
illustrating the {
periodic law },
described above .
[
1913 Webster ]
Note :
Note :
A modern version of the periodic table can be found at :
http ://
pearl1 .
lanl .
gov /
periodic /
default .
htm [
PJC ]
TABLE OF THE PERIODIC LAW OF THE CHEMICAL ELEMENTS (
The vertical columns contain the periodic groups )
Series1 [
2 [
3 [
4 [
5 [
6 [
7 [
8 [
9 [
10 [
11 [
12 [
--------------------------------------------------------------
|
I .
II .
III .
IV .
V .
VI .
VII .
VIII . |
RH4 RH3 RH3 RH |
R2O RO R3O3 RO2 R2O5 RO3 R2O7 RO4 --------------------------------------------------------------
H 1 Li 7 Na 23 K 39 (
Cu )
63 Rb 85 .
2 (
Ag )
(
108 )
Cs 133 (-)
(-)
(
Au )
(
197 )
---------------------------------------------------------------
[
1913 Webster ]
Note :
A similar relation had been enunciated in a crude way by Newlands ;
but the law in its effective form was developed and elaborated by Mendelejeff ,
whence it is sometimes called {
Mendelejeff '
s law }.
Important extensions of it were also made by L .
Meyer .
By this means Mendelejeff predicted with remarkable accuracy the hypothetical elements ekaboron ,
ekaluminium ,
and ekasilicon ,
afterwards discovered and named respectively scandium ,
gallium ,
and germanium .
[
1913 Webster ]
{
Periodic star } (
Astron .),
a variable star whose changes of brightness recur at fixed periods .
{
Periodic time of a heavenly body } (
Astron .),
the time of a complete revolution of the body about the sun ,
or of a satellite about its primary .
[
1913 Webster ]
Periodical \
Pe `
ri *
od "
ic *
al \,
n .
A magazine or other publication which appears at stated or regular intervals .
[
1913 Webster ]
55 Moby Thesaurus words for "
periodical ":
airing ,
almanac ,
alternate ,
annual ,
bandying ,
bimonthly ,
biweekly ,
book ,
broadcast ,
broadcasting ,
bruiting ,
bruiting about ,
circulation ,
daily ,
daybook ,
diary ,
diffusion ,
display ,
dissemination ,
ephemeris ,
evulgation ,
fortnightly ,
gazette ,
hebdomadal ,
isochronal ,
issuance ,
issue ,
journal ,
magazine ,
monthly ,
newsletter ,
newsmagazine ,
newspaper ,
organ ,
paper ,
pictorial ,
printing ,
promulgation ,
propagation ,
publication ,
publishing ,
quarterly ,
recurring ,
renew ,
review ,
serial ,
slick magazine ,
spread ,
spreading ,
spreading abroad ,
telecasting ,
trade magazine ,
ventilation ,
weekly ,
yearbook
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:
交管12123官网登录入口 - 百度知道 交管12123官网登录入口交管12123官网登录入口为:https: gab 122 gov cn m login。交管12123官网是由公安部统一研发,并由各地公安
全国大学英语四六级考试官网准考证打印入口 英语四六级考级报名指南_百度知道 深空游戏 2025-10-09 · 百度认证:东莞市深空信息咨询官方账号
SunRise - Forum Правила проекта Официальные источники Темы: 1 Актуальные источники SunRise Баги Темы: 1 Баги недоработки
Gnostic宇宙意识 的想法: 好词好句积累 | -Sunrise, Parabellum. -真的,我想再一次看见你,我能有什么希望呢?我的 . . . 好词好句积累 | -Sunrise, Parabellum -真的,我想再一次看见你,我能有什么希望呢?我的希望就是把和你再见的日子当成节日。 余秀华《且在人间》-我能够拥有告别时会痛彻心扉的东西,是何其幸运。 艾伦 米尔恩#好…
SunRise - Forum Подать жалобу на игрока CLASSIC-GRIEF-1 Подать жалобу на администратора CLASSIC-GRIEF-1
Digital_Sunrise - 知乎 我现在高二,我可以明确告诉你:没啥用。 我初中是学算法竞赛的,有机会也会去学其他感兴趣的东西,除了C++,py、前端三件套、go啥啥都学了一点。 全他妈自学的。 当时初二在机房建了个本地的静态网站高兴地上蹿下跳把内网链接给所有同学都发了一份,后面自己用python搓一个小项目忙前忙后
SunRise - Forum Предложения по серверу Предложения идеи
Jar of Love的歌词翻译成中文 - 百度知道 《Jar of Love》 词曲:曲婉婷 歌曲原唱:曲婉婷 Another sunrise, another sunset 又是一次日出,又是一次日落 Soon it'll all be yesterday 转瞬间都将变为昨天 Another good day, another bad day, 美好的一天,糟糕的一天 What did you do today? 你又是如何看待今天天 Why do we choose to chase what we'll lose? 为什么我们不断苛求一些我们
地平线(Horizon Robotics)是做什么的,有哪些产品? - 知乎 地平线(Horizon Robotics)是一家专门生产人工智能芯片的企业,目前已发展多年,取得了许多耀目的成就。目前,地平线(Horizon Robotics)已成功量产了中国首款边缘人工智能芯片——专注于智能驾驶的征程 (Journey) 1 和专注于 AIoT 的旭日 (Sunrise) 1 ;2019 年,地平线(Horizon Robotics)又推出了中国首款车
歌手Catie Mckinney的sunrise歌词 - 百度知道 展开全部 《Sunrise》 歌手:Catie Mckinney 所属专辑:《waiting for the light》 发行时间:2007年10月08日 歌词: i got to reach you 我必须找到你 i've gotta see you 我一定要见你 let the light shine down on me 让阳光照耀在我身上 when the day breaks 黎明破晓 and the sky is changing colors 天空也