sessileadj.

Brit.

/ˈsɛsʌɪl/,

/ˈsɛsɪl/, U.S.

/ˈsɛsəl/,

/ˈsɛˌsaɪl/

Etymology: < Latin sessilis sitting down, dwarfed, stunted, < sess- , participial stem of sedēre to sit: see -ile suffix.

1. Having no footstalk.

a. Botany. Of leaves, fruits, flowers, or other organs: Immediately attached by the base; not having a peduncle, pedicel, or the like. Hence of a species or variety (e.g. of oak) bearing sessile fruits: opposed to pedunculated.

ΘΚΠ

the world > plants > part of plant > stem or stalk > [adjective] > having or resembling a footstalk > not having a footstalk or sessile

sessile1753

squatted1760

subsessile1760

sitting1776

the world > plants > part of plant > reproductive part(s) > fruit or reproductive product > plant that bears fruit > [adjective] > bearing fruit or fruitful > with or without footstalk

stalk-fruited1869

sessile1875

1753 Chambers's Cycl. Suppl. at Leaf Sessile Leaf, one which rises immediately from the stalk without any pedicle.

1757 Philos. Trans. 1756 (Royal Soc.) 49 835 The leaves..[are] generally quite sessile, or close to the stalk.

1785 T. Martyn tr. J.-J. Rousseau Lett. Elements Bot. vi. 74 In the whole compound class, the seed is always sessile, that is, it bears immediately upon the receptacle without any intermediate pedicle.

1861 S. Thomson Wanderings among Wild Flowers (rev. ed.) i. 71 Seed-vessel of common Poppy, showing the rayed stigma..placed close down, or sessile upon the ovary.

1875 C. Lyell & L. Lyell Princ. Geol. (ed. 12) II. iii. xliv. 507 Prostrate trunks of the Sessile Variety of the Common oak occur.

1879 A. Gray in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) I. vi. §6. 251 The filament, being only a stalk or support, may be very short or wholly wanting; the anther is then sessile.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 565 In Piperaceæ however the stigma, which is sessile on the apex of the ovary, is often placed obliquely or divided into several lobes.

b. Zoology. Of limbs or organs: Immediately in contact with the structure to which they are attached; having no connecting neck or footstalk. Also of certain animals.

ΘΚΠ

the world > animals > animal body > general parts > [adjective] > having no connecting stalk

sessile1777

1777 T. Pennant Brit. Zool. (ed. 4, quarto) IV. vi. 72 The shell..fixed by a stem: or sessil.

1834 H. McMurtrie tr. G. Cuvier Animal Kingdom (abridged ed.) 298 The Læmodipoda are the only Malacostraca with sessile eyes.

1840 F. D. Bennett Narr. Whaling Voy. II. 248 A sessile spur on the heel.

1851 C. Darwin Monogr. Cirripedia i. (Ray Soc.) 4 The more important valves..being common to the pedunculated and sessile Cirripedes.

1870 G. Rolleston Forms Animal Life Introd. 65 The cerebral hemispheres always contain a lateral ventricle, which is prolonged into the interior of the sessile olfactory lobes.

c. Pathology. Of morbid growths, warts, etc.: Adhering close to the surface.

ΘΚΠ

the world > health and disease > ill health > a disease > growth or excrescence > [adjective] > qualities of

sessile1726

homoeoplastic1876

intrinsic1897

1726 P. Huxham in Philos. Trans. 1725 (Royal Soc.) 33 380 During the Suppuration, the Pox would become very sessile, and the coherent kind would enlarge their Bases exceedingly.

1822 J. M. Good Study Med. IV. 659 Simple Wart. Simple and distinct: sessile or pensile.

1899 T. C. Allbutt et al. Syst. Med. VIII. 891 The skin..in many cases ‘peppered’ with warts, both sessile and pedunculated.

2. Of certain animals: Sedentary, fixed to one spot; not ambulatory. Of cells: Immobile. Also in extended use.

ΘΚΠ

the world > animals > by locomotion > [adjective] > sedentary

sluggish1836

sedentary1851

sessile1860

the world > life > biology > biological processes > movement > [adjective] > not

sessile1904

the world > movement > absence of movement > [adjective] > remaining in one place

stablea1400

dormantc1440

standing1469

remanent?a1475

ledger1547

fixed1559

restiff1578

statary1581

permanent1588

consistent1604

stationary1631

fundamental1633

resident1653

sedentary1667

statual1752

loco-restive1796

untransmigrated1821

stabile1896

static1910

sessile1917

1860 F. C. L. Wraxall Life in Sea x. 242 They [Serpulariæ, etc.] are, therefore, nothing further than sessile nurses, just as the Siphonophoræ are nurses swimming about freely.

1871 E. D. Cope Origin Fittest (1887) 193 It is now important to observe that great numbers of centrifugal animals are sedentary or sessile; while the longitudinal are vagrant, moving from place to place.

1879 G. Allen Colour-sense iii. 23 Sessile or sedentary animals, as a rule, do not possess any form of visual organ.

1880 E. R. Lankester Degeneration 39 We may now proceed to look at some sessile or immobile animals which are not usually regarded as degenerate.

1904 Brit. Med. Jrnl. 10 Sept. 586/1 Certain cells which are normally fixed or sessile cells.

1917 M. Webb Gone to Earth xiii. 118 People remained in a sessile state over tea for a long time.

1930 W. H. Auden Poems 56 No chattering valves of laughter emphasised Nor the swept gown ends of a gesture stirred The sessile hush.

1935 T. E. Lawrence Seven Pillars (trade ed.) Synopsis 7 The current of tribal movements sessile or nomad.

1971 Guinness Bk. Records (ed. 18) 169/2 The longest recorded push of a normally sessile object is of 411 miles in the case of a wheeled hospital bed.

3. Crystallography. Of a dislocation in a crystal: unable to migrate through the lattice; fixed.

ΚΠ

1949 F. C. Frank in Proc. Physical Soc. A. 62 202 Glide is prevented by a large restoring force... Such a dislocation will be called ‘sessile’, in contrast with ‘glissile’ dislocations—those which are capable of glide.

1966 C. R. Tottle Sci. Engin. Materials iv. 101 Frank described one form of sessile dislocation, in which an aggregate of vacant lattice sites collapses to form a loop of dislocation surrounding a disk of stacking fault.

1973 J. G. Tweeddale Materials Technol. I. v. 111 In the latter case they lock together (forming a sessile dislocation) and become very difficult to separate.

Compounds

C1. General attributive.

sessile-eyed adj.

ΚΠ

1854 A. Adams et al. Man. Nat. Hist. 294 Sessile-eyed Crustaceans (Edriophthalmata).

sessile-flowered adj.

ΚΠ

1800 C. Marshall Introd. Knowl. & Pract. Gardening (ed. 3) xix. 350 Herb-true-love, nodding, and sessile flowered.

sessile-fruited adj.

ΚΠ

1846 T. Keightley Notes Bucolics & Georgics of Virgil 391 The Quercus sessiliflora, or sessile-fruited oak.

sessile-leaved adj.

ΚΠ

1822 S. Clarke Hortus Anglicus II. 356 Sessile-leaved Eupatorium.

C2.

sessile oak n. Quercus petræa, which has stalkless acorns; = durmast n.

ΘΚΠ

the world > plants > particular plants > trees and shrubs > tree or shrub groups > oak and allies > [noun] > other oaks

red oakOE

cerre-tree1577

gall-tree1597

robur1601

kermes1605

live oak1610

white oak1610

royal oak1616

swamp-oak1683

grey oak1697

rock oak1699

chestnut oak1703

water oak1709

Spanish oak1716

turkey-oak1717

willow oak1717

iron oak1724

maiden oak1725

scarlet oak1738

black jack1765

post oak1775

durmast1791

mountain chestnut oak1801

quercitron oak1803

laurel oak1810

mossy-cup oak1810

rock chestnut oak1810

pin oak1812

overcup oak1814

overcup white oak1814

bur oak1815

jack oak1816

mountain oak1818

shingle-oak1818

gall-oak1835

peach oak1835

golden oak1838

weeping oak1838

Aleppo oak1845

Italian oak1858

dyer's oak1861

Gambel's Oak1878

maul oak1884

punk oak1884

sessile oak1906

Garry oak1908

roble1908

1838 J. C. Loudon Arboretum III. 1736 (heading) The sessile-flowered Oak.]

1906 H. J. Elwes & A. Henry Trees Great Brit. & Ireland II. 291 Sessile or Durmast Oak... More regular branching, resulting in a denser crown of foliage.

1971 Country Life 23 Dec. 1772/1 The lighter soils and hills were covered by the sessile oak, with acorns pressed against the twigs, and leaves on long stalks.

Draft additions 1993

seˈssility n.

ΘΚΠ

the world > life > biology > biological processes > movement > [noun] > lack of movement

sessility1903

1903 Amer. Geologist 31 204 Such cases as these make cameration appear as a result of vertical sessility and therefore allow us to infer from such cameration, this sessile mode of life.

1940 Nature 30 Mar. 484/2 Altenburg..notes that hermaphroditism is related to sluggishness and sessility.

1982 Acta Biol. et Med. Germanica 51 145 The loss of this glycoprotein might thus be associated with a loss of sessility of bovine lymphoid cells.

This entry has not yet been fully updated (first published 1912; most recently modified version published online March 2022).

单词	sessile
释义	sessileadj. Brit. /ˈsɛsʌɪl/, /ˈsɛsɪl/, U.S. /ˈsɛsəl/, /ˈsɛˌsaɪl/ Etymology: < Latin sessilis sitting down, dwarfed, stunted, < sess- , participial stem of sedēre to sit: see -ile suffix. 1. Having no footstalk. a. Botany. Of leaves, fruits, flowers, or other organs: Immediately attached by the base; not having a peduncle, pedicel, or the like. Hence of a species or variety (e.g. of oak) bearing sessile fruits: opposed to pedunculated. ΘΚΠ the world > plants > part of plant > stem or stalk > [adjective] > having or resembling a footstalk > not having a footstalk or sessile sessile1753 squatted1760 subsessile1760 sitting1776 the world > plants > part of plant > reproductive part(s) > fruit or reproductive product > plant that bears fruit > [adjective] > bearing fruit or fruitful > with or without footstalk stalk-fruited1869 sessile1875 1753 Chambers's Cycl. Suppl. at Leaf Sessile Leaf, one which rises immediately from the stalk without any pedicle. 1757 Philos. Trans. 1756 (Royal Soc.) 49 835 The leaves..[are] generally quite sessile, or close to the stalk. 1785 T. Martyn tr. J.-J. Rousseau Lett. Elements Bot. vi. 74 In the whole compound class, the seed is always sessile, that is, it bears immediately upon the receptacle without any intermediate pedicle. 1861 S. Thomson Wanderings among Wild Flowers (rev. ed.) i. 71 Seed-vessel of common Poppy, showing the rayed stigma..placed close down, or sessile upon the ovary. 1875 C. Lyell & L. Lyell Princ. Geol. (ed. 12) II. iii. xliv. 507 Prostrate trunks of the Sessile Variety of the Common oak occur. 1879 A. Gray in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) I. vi. §6. 251 The filament, being only a stalk or support, may be very short or wholly wanting; the anther is then sessile. 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 565 In Piperaceæ however the stigma, which is sessile on the apex of the ovary, is often placed obliquely or divided into several lobes. b. Zoology. Of limbs or organs: Immediately in contact with the structure to which they are attached; having no connecting neck or footstalk. Also of certain animals. ΘΚΠ the world > animals > animal body > general parts > [adjective] > having no connecting stalk sessile1777 1777 T. Pennant Brit. Zool. (ed. 4, quarto) IV. vi. 72 The shell..fixed by a stem: or sessil. 1834 H. McMurtrie tr. G. Cuvier Animal Kingdom (abridged ed.) 298 The Læmodipoda are the only Malacostraca with sessile eyes. 1840 F. D. Bennett Narr. Whaling Voy. II. 248 A sessile spur on the heel. 1851 C. Darwin Monogr. Cirripedia i. (Ray Soc.) 4 The more important valves..being common to the pedunculated and sessile Cirripedes. 1870 G. Rolleston Forms Animal Life Introd. 65 The cerebral hemispheres always contain a lateral ventricle, which is prolonged into the interior of the sessile olfactory lobes. c. Pathology. Of morbid growths, warts, etc.: Adhering close to the surface. ΘΚΠ the world > health and disease > ill health > a disease > growth or excrescence > [adjective] > qualities of sessile1726 homoeoplastic1876 intrinsic1897 1726 P. Huxham in Philos. Trans. 1725 (Royal Soc.) 33 380 During the Suppuration, the Pox would become very sessile, and the coherent kind would enlarge their Bases exceedingly. 1822 J. M. Good Study Med. IV. 659 Simple Wart. Simple and distinct: sessile or pensile. 1899 T. C. Allbutt et al. Syst. Med. VIII. 891 The skin..in many cases ‘peppered’ with warts, both sessile and pedunculated. 2. Of certain animals: Sedentary, fixed to one spot; not ambulatory. Of cells: Immobile. Also in extended use. ΘΚΠ the world > animals > by locomotion > [adjective] > sedentary sluggish1836 sedentary1851 sessile1860 the world > life > biology > biological processes > movement > [adjective] > not sessile1904 the world > movement > absence of movement > [adjective] > remaining in one place stablea1400 dormantc1440 standing1469 remanent?a1475 ledger1547 fixed1559 restiff1578 statary1581 permanent1588 consistent1604 stationary1631 fundamental1633 resident1653 sedentary1667 statual1752 loco-restive1796 untransmigrated1821 stabile1896 static1910 sessile1917 1860 F. C. L. Wraxall Life in Sea x. 242 They [Serpulariæ, etc.] are, therefore, nothing further than sessile nurses, just as the Siphonophoræ are nurses swimming about freely. 1871 E. D. Cope Origin Fittest (1887) 193 It is now important to observe that great numbers of centrifugal animals are sedentary or sessile; while the longitudinal are vagrant, moving from place to place. 1879 G. Allen Colour-sense iii. 23 Sessile or sedentary animals, as a rule, do not possess any form of visual organ. 1880 E. R. Lankester Degeneration 39 We may now proceed to look at some sessile or immobile animals which are not usually regarded as degenerate. 1904 Brit. Med. Jrnl. 10 Sept. 586/1 Certain cells which are normally fixed or sessile cells. 1917 M. Webb Gone to Earth xiii. 118 People remained in a sessile state over tea for a long time. 1930 W. H. Auden Poems 56 No chattering valves of laughter emphasised Nor the swept gown ends of a gesture stirred The sessile hush. 1935 T. E. Lawrence Seven Pillars (trade ed.) Synopsis 7 The current of tribal movements sessile or nomad. 1971 Guinness Bk. Records (ed. 18) 169/2 The longest recorded push of a normally sessile object is of 411 miles in the case of a wheeled hospital bed. 3. Crystallography. Of a dislocation in a crystal: unable to migrate through the lattice; fixed. ΚΠ 1949 F. C. Frank in Proc. Physical Soc. A. 62 202 Glide is prevented by a large restoring force... Such a dislocation will be called ‘sessile’, in contrast with ‘glissile’ dislocations—those which are capable of glide. 1966 C. R. Tottle Sci. Engin. Materials iv. 101 Frank described one form of sessile dislocation, in which an aggregate of vacant lattice sites collapses to form a loop of dislocation surrounding a disk of stacking fault. 1973 J. G. Tweeddale Materials Technol. I. v. 111 In the latter case they lock together (forming a sessile dislocation) and become very difficult to separate. Compounds C1. General attributive. sessile-eyed adj. ΚΠ 1854 A. Adams et al. Man. Nat. Hist. 294 Sessile-eyed Crustaceans (Edriophthalmata). sessile-flowered adj. ΚΠ 1800 C. Marshall Introd. Knowl. & Pract. Gardening (ed. 3) xix. 350 Herb-true-love, nodding, and sessile flowered. sessile-fruited adj. ΚΠ 1846 T. Keightley Notes Bucolics & Georgics of Virgil 391 The Quercus sessiliflora, or sessile-fruited oak. sessile-leaved adj. ΚΠ 1822 S. Clarke Hortus Anglicus II. 356 Sessile-leaved Eupatorium. C2. sessile oak n. Quercus petræa, which has stalkless acorns; = durmast n. ΘΚΠ the world > plants > particular plants > trees and shrubs > tree or shrub groups > oak and allies > [noun] > other oaks red oakOE cerre-tree1577 gall-tree1597 robur1601 kermes1605 live oak1610 white oak1610 royal oak1616 swamp-oak1683 grey oak1697 rock oak1699 chestnut oak1703 water oak1709 Spanish oak1716 turkey-oak1717 willow oak1717 iron oak1724 maiden oak1725 scarlet oak1738 black jack1765 post oak1775 durmast1791 mountain chestnut oak1801 quercitron oak1803 laurel oak1810 mossy-cup oak1810 rock chestnut oak1810 pin oak1812 overcup oak1814 overcup white oak1814 bur oak1815 jack oak1816 mountain oak1818 shingle-oak1818 gall-oak1835 peach oak1835 golden oak1838 weeping oak1838 Aleppo oak1845 Italian oak1858 dyer's oak1861 Gambel's Oak1878 maul oak1884 punk oak1884 sessile oak1906 Garry oak1908 roble1908 1838 J. C. Loudon Arboretum III. 1736 (heading) The sessile-flowered Oak.] 1906 H. J. Elwes & A. Henry Trees Great Brit. & Ireland II. 291 Sessile or Durmast Oak... More regular branching, resulting in a denser crown of foliage. 1971 Country Life 23 Dec. 1772/1 The lighter soils and hills were covered by the sessile oak, with acorns pressed against the twigs, and leaves on long stalks. Draft additions 1993 seˈssility n. ΘΚΠ the world > life > biology > biological processes > movement > [noun] > lack of movement sessility1903 1903 Amer. Geologist 31 204 Such cases as these make cameration appear as a result of vertical sessility and therefore allow us to infer from such cameration, this sessile mode of life. 1940 Nature 30 Mar. 484/2 Altenburg..notes that hermaphroditism is related to sluggishness and sessility. 1982 Acta Biol. et Med. Germanica 51 145 The loss of this glycoprotein might thus be associated with a loss of sessility of bovine lymphoid cells. This entry has not yet been fully updated (first published 1912; most recently modified version published online March 2022). < adj.1726
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