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bicyclic    
二环的

二环的

bicyclic
adj 1: having molecules consisting of two fused rings

Cyclic \Cyc"lic\ (s?k"l?k or s?"kl?k), Cyclical \Cyc"lic*al\
(s?k"l?-kal), a. [Cf. F. cycluque, Gr. kykliko`s, fr. ky`klos
See {Cycle}.]
1. Of or pertaining to a cycle or circle; moving in cycles;
as, cyclical time. --Coleridge.
[1913 Webster]

2. (Chemistry) Having atoms bonded to form a ring structure.
Opposite of {acyclic}.

Note: Used most commonly in respect to organic compounds.

Note: [Narrower terms: {bicyclic}; {heterocyclic};
{homocyclic, isocyclic}]

Syn: closed-chain, closed-ring.
[WordNet 1.5]

3. Recurring in cycles[2]; having a pattern that repeats at
approximately equal intervals; periodic. Opposite of
{noncyclic}.

Note: [Narrower terms: {alternate(prenominal),
alternating(prenominal)}; {alternate(prenominal), every
other(prenominal), every second(prenominal)};
{alternating(prenominal), oscillating(prenominal)};
{biyearly}; {circadian exhibiting 24-hour
periodicity)}; {circular}; {daily, diurnal};
{fortnightly, biweekly}; {hourly}; {midweek,
midweekly}; {seasonal}; {semestral, semestrial};
{semiannual, biannual, biyearly}; {semiweekly,
biweekly}; {weekly}; {annual, yearly}; {biennial};
{bimonthly, bimestrial}; {half-hourly}; {half-yearly};
{monthly}; {tertian, alternate(prenominal)};
{triennial}]
[WordNet 1.5]

4. Marked by repeated cycles[2].
[WordNet 1.5]

{Cyclic chorus}, the chorus which performed the songs and
dances of the dithyrambic odes at Athens, dancing round
the altar of Bacchus in a circle.

{Cyclic poets}, certain epic poets who followed Homer, and
wrote merely on the Trojan war and its heroes; -- so
called because keeping within the circle of a single
subject. Also, any series or coterie of poets writing on
one subject. --Milman.
[1913 Webster]


Bicyclic \Bi*cyc"lic\, a.
Relating to bicycles.
[1913 Webster]


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  • Poltergeist - Wikipedia
    In German folklore and ghostlore, a poltergeist ( ˈpoʊltərˌɡaɪst or ˈpɒltərˌɡaɪst ; German: [ˈpɔltɐɡaɪ̯st] ⓘ; 'rumbling ghost' or 'noisy spirit') is a type of ghost or spirit that is responsible for physical disturbances, such as loud noises and objects being moved or destroyed
  • POLTERGEIST Definition Meaning - Merriam-Webster
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  • Poltergeist | Paranormal, Supernatural, Haunting | Britannica
    Poltergeist, (from German Polter, “noise” or “racket”; Geist, “spirit”), in occultism, a disembodied spirit or supernatural force credited with certain malicious or disturbing phenomena, such as inexplicable noises, sudden wild movements, or breakage of household items
  • POLTERGEIST Definition Meaning | Dictionary. com
    POLTERGEIST definition: a ghost or spirit supposed to manifest its presence by noises, knockings, etc See examples of poltergeist used in a sentence
  • Poltergeists: Meaning, Signs, and Stories - Centre of Excellence
    A poltergeist is a type of ghost or supernatural entity known for causing physical disturbances, such as loud noises and objects being moved or thrown around Unlike other ghosts that might appear visually, poltergeists are more often associated with auditory and physical manifestations
  • POLTERGEIST | definition in the Cambridge English Dictionary
    Poltergeists are usually focused around adolescents who have a lot of angst Historically, the poltergeist was theorized to be nothing more than a local schoolteacher who worked with several people to scare a family
  • What Is a Poltergeist? Definition, Manifestations, and History
    What Is a Poltergeist? A poltergeist is a type of ghost or spirit responsible for physical disturbances, such as loud noises and the movement or destruction of objects The term originates from the German words poltern, meaning “to make noise” or “to rumble,” and Geist, meaning “ghost” or “spirit ”
  • What Is a Poltergeist? Definition of the Phenomenon - LiveAbout
    Poltergeist is a German word meaning "noisy spirit " It describes many effects such as knocks on walls, objects thrown about by unseen hands, furniture moved, and other occurrences
  • What is a Poltergeist? - The Paranormal Society
    Poltergeist is a German word that means noisy ghost The word comes from the German term poltern, to knock, and geist, which means spirit It’s very important to understand the true nature of the poltergeist phenomenon





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