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triennial    音标拼音: [trɑɪ'ɛniəl]
a. 每三年一次的
n. 三年生植物,三年发生一次的事

每三年一次的三年生植物,三年发生一次的事

triennial
adj 1: occurring every third year or lasting 3 years
n 1: the 300th anniversary (or the celebration of it) [synonym:
{tercentennial}, {tercentenary}, {triennial}]

Triennial \Tri*en"ni*al\, n.
Something which takes place or appears once in three years.
[1913 Webster]


Triennial \Tri*en"ni*al\, a. [L. triennium the space of three
years; tri- (see {Tri-}) annus year. See {Annual}.]
1. Continuing three years; as, triennial parliaments; a
triennial reign. --Howell.
[1913 Webster]

2. Happening, coming about, or appearing once in every three
years; as, triennial elections; a triennial catalogue; a
triennial visitation. --T. Warton.
[1913 Webster]


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]

89 Moby Thesaurus words for "triennial":
amphibian, angiosperm, anniversary, annual, annual holiday,
aquatic plant, biannual, bicentenary, bicentennial, biennial,
bimonthly, birthday, bissextile day, biweekly, catamenial,
centenary, centennial, commemoration, cosmopolite, cutting, daily,
decennial, deciduous plant, diamond jubilee, dicot, dicotyledon,
diurnal, ephemeral, evergreen, exotic, flowering plant,
fortnightly, fungus, gametophyte, golden wedding anniversary,
gymnosperm, hebdomadal, holy days, hourly, hydrophyte,
immovable feast, jubilee, leap year, menstrual, momentary,
momently, monocot, monocotyl, monthly, name day, natal day,
octennial, perennial, plant, polycot, polycotyl, polycotyledon,
quadrennial, quarterly, quasquicentennial, quincentenary,
quincentennial, quinquennial, quotidian, secular, seed plant,
seedling, semestral, semiannual, semimonthly, semiweekly,
semiyearly, septennial, sesquicentennial, sextennial,
silver wedding anniversary, spermatophyte, sporophyte,
tercentenary, tercentennial, tertian, thallophyte, tricennial,
vascular plant, vegetable, wedding anniversary, weed, weekly,
yearly


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