biennial 音标拼音: [bɑɪ'ɛniəl]
n . 二年生植物,二年一次的事
a . 二年生的,二年一次的
二年生植物,二年一次的事二年生的,二年一次的
biennial adj 1 :
having a life cycle lasting two seasons ; "
a biennial life cycle "; "
parsnips and carrots are biennial plants often grown as annuals " [
synonym : {
biennial }, {
two -
year }] [
ant :
{
annual }, {
one -
year }, {
perennial }]
2 :
occurring every second year ; "
they met at biennial conventions " [
synonym : {
biennial }, {
biyearly }]
n 1 : (
botany )
a plant having a life cycle that normally takes two seasons from germination to death to complete ;
flowering biennials usually bloom and fruit in the second season 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 ]
Biennial \
Bi *
en "
ni *
al \,
a . [
L .
biennalis and biennis ,
fr .
biennium a space of two years ;
bis twice annus year .
Cf .
{
Annual }.]
1 .
Happening ,
or taking place ,
once in two years ;
as ,
a biennial election .
[
1913 Webster ]
2 . (
Bot .)
Continuing for two years ,
and then perishing ,
as plants which form roots and leaves the first year ,
and produce fruit the second .
[
1913 Webster ]
Biennial \
Bi *
en "
ni *
al \,
n .
1 .
Something which takes place or appears once in two years ;
esp .
a biennial examination .
[
1913 Webster ]
2 . (
Bot .)
A plant which exists or lasts for two years .
[
1913 Webster ]
89 Moby Thesaurus words for "
biennial ":
amphibian ,
angiosperm ,
anniversary ,
annual ,
annual holiday ,
aquatic plant ,
biannual ,
bicentenary ,
bicentennial ,
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 ,
triennial ,
vascular plant ,
vegetable ,
wedding anniversary ,
weed ,
weekly ,
yearly
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