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单词 deciduous
释义

deciduousadj.

Brit. /dᵻˈsɪdjʊəs/, /dᵻˈsɪdʒʊəs/, U.S. /dəˈsɪdʒəwəs/
Origin: A borrowing from Latin, combined with an English element. Etymons: Latin dēciduus , -ous suffix.
Etymology: < classical Latin dēciduus tending to fall, falling, hanging down, in post-classical Latin also fleeting, transitory (from 6th cent. in British sources), designating parts of plants or animals (1615 (in the passage translated in quot. 1657 at sense 2a) or earlier), designating a membrane (1766 or earlier; < dēcidere decide v.2 + -uus : see -uous suffix) + -ous suffix. Compare French décidu (1611 as †decidu , originally in sense 2a).
1. Falling down or off. Obsolete. rare.
ΘΚΠ
the world > movement > motion in a certain direction > downward motion > falling > [adjective]
fallingeOE
tumblingc1374
falling-downc1384
cadukec1420
rueing1557
downfalling1573
cadenta1616
deciduous1656
decident1674
1656 H. More Enthusiasmus Triumphatus 45 The Lightnings without thunder are as it were the deciduous flowers of the aestivall Starres.
2.
a. Botany and Zoology. Of parts of plants or animals (as leaves, petals, teeth, or antlers): falling off or shed at a particular time, season, or stage of growth. Often contrasted with persistent or permanent.deciduous tooth: see Compounds.
ΘΚΠ
the world > plants > part of plant > growth, movement, or curvature of parts > [adjective] > permanent or discarded
shedc1430
deciduous1657
marcescent1727
fugacious1750
permanent1776
shrivelling1776
persisting1777
persistent1785
sphacelate1785
shedding1796
sphacelated1806
caducous1808
restant1828
fugitive1830
horarious1866
the world > life > biology > physical aspects or shapes > physical arrangement or condition > [adjective] > attached or becoming united > shed
deciduous1657
deciduary1803
caducous1808
1657 R. Tomlinson tr. J. de Renou Medicinal Materials i., in Medicinal Dispensatory sig. Xx3v Now Anethum..is sowen in Gardens, and annually revives from the deciduous seed [L. ex deciduo semine].
1690 R. Boyle Christian Virtuoso ii. ii. §i Which some anatomists therefore call deciduous parts, such as the placenta uterina, and the different membranes that involve the fœtus.
1766 T. Pennant Brit. Zool. i. p. i Upright branched horns, annually deciduous.
1785 W. Cowper Task iii. 468 Ere the beech and elm have cast their leaf Deciduous.
1875 C. Darwin Insectivorous Plants xv. 353 The deciduous..scales of the leaf buds.
1929 R. Veitch & J. H. Simmonds Pests & Diseases Queensland Fruit & Vegetables 59 All the important enemies of deciduous fruits in this State have been introduced from overseas.
2006 Manly (Austral.) Daily (Nexis) 11 Nov. 39 This is a tall native tree with smooth bark that is deciduous.
b. Botany. Of a perennial plant, esp. a tree or shrub: that sheds its leaves every year; (also of woodland, etc.) composed of or dominated by such plants. Contrasted with evergreen.
ΘΚΠ
the world > plants > by age or cycles > [adjective] > deciduous
perdifolious1657
deciduous1668
1668 Bp. J. Wilkins Ess. Real Char. ii. iv. 111 Graniferous deciduous shrubs.
1778 R. Lowth Isaiah (ed. 12) Notes 144 The oak [and] the terebinth..being deciduous; where the Prophet's design seems to me to require an ever-green.
1798 J. Atkinson Killarney 6 The cone-like spruce, the sombrous fir and pine, here with deciduous vegetation twine.
1827 H. Steuart Planter's Guide (1828) 224 These had been introduced merely as nurses to the deciduous Trees.
1848 J. M. Wilson Rural Cycl. II. 56/2 The rest [of the species of dragon's head] are hardy, herbaceous, deciduous perennials.
1910 Ann. Rep. New Jersey State Mus. 1909 826 Rocky, hilly country covered by deciduous woodland.
1930 T. W. Briscoe Orchids for Amateurs iv. 96 Pleiones are deciduous, and the leaves usually fall when the growths are matured.
2010 C. G. K. Atkins My Imaginary Illness xi. 81 The hospital's manicured lawns fell away into deciduous shrubbery and copses of immature trees.
c. Physiology and Medicine. Of or relating to decidua; = decidual adj.
ΘΚΠ
the world > life > the body > sex organs > female sex organs > [adjective] > womb > parts of
deciduous1774
decidual1806
cervical1860
parametrial1903
paracervical1922
decidualized1943
1774 J. Curry Some Thoughts Nature of Fevers App. 64 The blackness was found to be nothing more than the putrid lochia and deciduous membrane.
1829 C. Bell & J. Bell Anat. Human Body (ed. 7) III. 445 That the ovum..upon its descent gets entangled behind the deciduous membrane.
1868 R. Owen On Anat. Vertebr. III. xxxviii. 725 The normal canal of the uterus is obliterated by the accumulated deciduous substance.
1911 St. Louis Med. Rev. Nov. 346/1 The deciduous membrane of initial fetal life.
2009 Maturitas 65 Suppl. No. 1. s26/2 Elevated levels.., which can be associated with damage to the deciduous membrane, have also been proposed as an indicator of miscarriage risk.
d. Zoology. Of the wings of insects, esp. ants and termites: shed after copulation.
ΚΠ
1875 J. H. Comstock Notes on Entomol. 1 Some forms, as the workers among ants, are wingless; with others the wings are deciduous.
1935 Philippine Jrnl. Sci. 56 180 Deciduous wings are rare among the Diptera.
2010 P. J. Gullan & P. S. Cranston Insects (ed. 4) ii. 47 In termites..and ants..the winged reproductives, or alates, have large deciduous wings that are shed after the nuptial flight.
3.
a. figurative (chiefly poetic and literary). Designating something which perishes or disappears, esp. after having served its purpose; fleeting, transitory. Also: that sheds or loses things over time.
ΘΚΠ
the world > time > duration > shortness or brevity in time > swift movement of time > [adjective]
slidinga900
scrithingOE
henwardOE
swifta1225
short livya1325
passing1340
flittingc1374
shadowy1374
temporalc1384
speedfula1400
transitory?c1400
brittlea1425
unabidingc1430
frail?c1450
indurablec1450
scrithel?c1475
caduke1483
transitorious1492
passanta1500
perishinga1500
caducea1513
fugitive?1518
caducal?1548
quick1548
delible1549
flittering1549
undurable?1555
shadowish1561
fleeting1563
vading1566
flightful1571
wanzing1571
transitive1575
slipping1581
diary1583
unlasting1585
never-lasting1588
flit1590
post-like1594
running1598
short-lived1598
short-winded1598
transient1599
unpermanent1607
flashy1609
of a day1612
passable1613
dureless1614
urgenta1616
waxena1616
decayable1617
horary1620
evanid1626
fugitable1628
short-dated1632
fugacious1635
ephemerala1639
impermanent1653
fungous1655
volatile1655
ephemerousa1660
unimmortal1667
timesome1674
while-being1674
of passage1680
journal1685
ephemeron1714
admovent1727
evanescent1728
meteorous1750
deciduous1763
preterient1786
ephemeridal1795
meteorica1802
meteor1803
ephemerean1804
ephemerid1804
evanescing1805
fleeted1810
fleet1812
unenduring1814
unremaining1817
unimmortalized1839
impersistent1849
flighty1850
uneternal1862
caducous1863
diurnal1866
horarious1866
brisk1879
evasive1881
picaresque1959
1763 Public Advertiser 2 Sept. Her [sc. Fashion's] charms deciduous but decay, To sprout again some future day.
1811 W. R. Spencer Poems Ded. E'en Fancy's rose deciduous dies.
1841 R. W. Emerson Love in Ess. 1st Ser. (London ed.) 187 They discover that all which at first drew them together..was deciduous.
1870 J. R. Lowell Among my Bks. 170 There is much that is deciduous in books, but all that gives them a title to rank as literature in the highest sense is perennial.
1927 E. A. Robinson Coll. Poems (1937) 663 He may not be so rotten as some whose names Have fallen from my deciduous memory.
1995 P. Conroy Beach Music (1996) iv. 73 I tried to remember her long, unseen limbs, to conjure her every movement in the deciduous empire of touch, every pressure of her breasts and response of her legs and heels.
b. Waning, declining. Obsolete. rare.
ΘΚΠ
the world > time > day and night > day or daytime > [adjective] > ending
decliningc1620
waning1767
deciduous1770
1770 E. Marshall Candid State of Evid. Specific for Gout 42 Her health..was reduc'd to the most deciduous state.
1791 E. Darwin Bot. Garden: Pt. I i. 16 Yon round deciduous day, Tressed with soft beams.

Compounds

deciduous tooth n. = milk tooth n. 1.
ΘΚΠ
the world > life > the body > digestive or excretive organs > digestive organs > mouth > types or spec. teeth > [noun] > milk
calf's-teeth1599
fore-tooth1601
sucking-tooth1601
milk tooth1738
deciduous tooth1755
shedding tooth1799
temporary tooth1802
baby tooth1834
1755 New & Compl. Dict. Arts & Sci. IV. 3178/1 Tooth drawing, however wrong in many cases, yet is certainly right and necessary in others. 1. In children, for the removing their lacteal or deciduous teeth [etc.].
1851 Abstr. Papers Royal Soc. 1843–50 5 917 These observations prove that..the Wart-hogs have deciduous teeth, succeeded vertically by premolar teeth.
2000 C. Tudge Variety of Life ii. xviii. 435 Mammals conventionally grow just two sets in their lives—the ‘milk’ or deciduous teeth, and then the adult set.

Derivatives

deˈciduously adv. chiefly Botany in a deciduous manner.
ΚΠ
1815 Bot. Reg. 1 Pl. 12 It is of quick growth..with round branches of a brownish red colour, deciduously villous, pliant, and weak.
1868 R. Owen On Anat. Vertebr. III. xxxviii. 725 The deciduously developed lining substance of the womb.
1986 Brittonia 38 62 Adaxial surface slightly concave, deciduously scaly.
2010 P. Krishen in M. Dayal Celebrating Delhi 92 Bring the arjuns and jumuns to Delhi, however, and they start behaving deciduously.
This entry has been updated (OED Third Edition, June 2015; most recently modified version published online March 2022).
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adj.1656
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