英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

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


请选择你想看的字典辞典:
单词字典翻译
periodical查看 periodical 在百度字典中的解释百度英翻中〔查看〕
periodical查看 periodical 在Google字典中的解释Google英翻中〔查看〕
periodical查看 periodical 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Contact Us - Microsoft Support
    Contact Microsoft Support Find solutions to common problems, or get help from a support agent
  • Account help - support. microsoft. com
    Get help for the account you use with Microsoft Find how to set up Microsoft account, protect it, and use it to manage your services and subscriptions
  • Sign in to Microsoft 365
    With Microsoft 365, you can install Microsoft 365 or Office on all your devices and sign in to Office on five devices at the same time This includes any combination of PCs, Macs, tablets, and phones
  • All Products - support. microsoft. com
    Find out how to get support for Microsoft apps and services
  • March 10, 2026—KB5079473 (OS Builds 26200. 8037 and 26100. 8037 . . .
    This cumulative update for Windows 11, version 25H2 and 24H2 (KB5079473), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained
  • Microsoft Edge help learning
    Get help and support for Microsoft Edge Find Microsoft Edge support content, how-to articles, tutorials, and more
  • Introducing multi-model intelligence in Researcher | Microsoft . . .
    Today, Researcher—Microsoft 365 Copilot's deep research agent for work—takes a significant step forward Designed to tackle complex research in the flow of work, Researcher now goes further with two new multi-model capabilities that raise the bar for accuracy, depth, and confidence: Critique and Council Critique is a new multi model deep research system designed for complex research tasks
  • What is a Microsoft account? - Microsoft Support
    Your Microsoft account dashboard is where you can manage your personal information and security settings, keep tabs on your subscriptions and order history, and manage your payment and billing options You can also organize your family’s digital life, track the health and safety of your devices, and browse or redeem rewards
  • Windows help and learning - support. microsoft. com
    Find help and how-to articles for Windows operating systems Get support for Windows and learn about installation, updates, privacy, security and more
  • Microsoft Credentials roundup: February 2026 edition | Microsoft . . .
    February nbsp;2026 brings major updates to Microsoft Credentials—four new Microsoft Certifications and six new Microsoft Applied Skills now generally





中文字典-英文字典  2005-2009