porosityn.

Brit.

/pɔːˈrɒsᵻti/, U.S.

/pəˈrɑsədi/,

/poʊˈrɑsədi/

Forms: Middle English porrosite, Middle English 1600s porosite, 1500s porositye, 1500s porrositie, 1500s–1600s porositie, 1600s– porosity.

Origin: Of multiple origins. Partly a borrowing from French. Partly a borrowing from Latin. Etymons: French porosité; Latin porositas.

Etymology: < Middle French porosité, porrosité quality or state of being porous, porous part or structure (1314 in Old French; French porosité quality or state of being porous) and its etymon post-classical Latin porositas quality or state of being porous (from c1200 in British sources), porous part or structure (1363 in Chauliac; compare quot. ?a1425 at sense 2) < porosus porous adj. + classical Latin -tās (see -ty suffix¹; compare -ity suffix). Compare Catalan porositat (1491), Spanish porosidad (a1450 as porosidat), Italian porosità (mid 14th cent.).

1. The quality or state of being porous; porous consistency. Also: the degree to which a substance is porous.

ΘΚΠ

the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > small opening > minute hole > quality of being full of

plumminessa1398

porositya1398

spongiosity?1541

spongiousness1598

sponginess1610

poriness1653

porousness1653

porishness1670

poroseness1679

pore1756

a1398 J. Trevisa tr. Bartholomaeus Anglicus De Proprietatibus Rerum (BL Add.) f. 30 Porosite [L. porositatem] of þe tree drawiþ þe fumosite from þe rinde.

c1475 ( Surg. Treat. in MS Wellcome 564 f. 18^v (MED) Þe brayn panne..is spongeous in þe myddil; þer beþ assigned þre causis: The firste, þat þe fumositees of þe brayn myȝte þe bettere passe out bi þe porrosite..The iij is þat bi his porrosite þe blood þat is norischinge to þe brayn schulde be þe bettere kept.

1615 H. Crooke Μικροκοσμογραϕια 385 This porosite also makes their vpper face smooth, and bedewed with a kind of slimy moisture.

1681 N. Grew Musæum Regalis Societatis ii. i. v. 213 Unciam densus, saith Clusius improperly; that word not expressing the Dimention, but closeness or little porosity of a Body.

1752 Philos. Trans. 1749–50 (Royal Soc.) 46 181 The moderate Heat..allows the Glass to acquire its due consistence in this state of middling Porosity.

1794 R. Kirwan Elements Mineral. (ed. 2) I. 231 It is the porosity of this stone that renders it so light.

1841 Brit. & Foreign Med. Rev. 12 158 Osteoporosis, or porosity of bone, is formed by a loosening of the tissue.

1876 J. Tyndall Fragm. Sci. (ed. 5) i. v. 176 In virtue of its extreme porosity, a similar power is possessed by charcoal.

1953 R. W. Fairbrother Text-bk. Bacteriol. (ed. 7) vi. 66 Seitz filters are asbestos discs..made in two grades of porosity: ‘K’ for clarifying, and ‘EK’ for removing bacteria.

1975 G. Anderson Coring i. 2 Porosity is a measure of the space in a rock not occupied by the solid structure or framework of the rock. It is defined as the fraction of the total bulk volume of the rock not occupied by solids.

1990 Sci. Amer. May 77/2 The decelerating force and air friction, which together are known as drag, can be controlled by changing a parachute's geometry and porosity.

2. A porous part or structure; an interstice, a pore; pores collectively. Usually in plural.

ΘΚΠ

the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > small opening > minute hole > quality of being full of > porous part or thing

porosity?a1425

spongiosity1543

porousness1644

poriness1653

sponge1682

?a1425 tr. Guy de Chauliac Grande Chirurgie (N.Y. Acad. Med.) f. 172 (MED) Restrictif medicyne of blode..gleweþ & stoppeþ þe porositeez [L. porositates] of þe membrez.

1598 A. M. tr. J. Guillemeau Frenche Chirurg. 9 b/2 The Diploe, that is, the porositye which is betweene them bothe [sc. tables of the skull].

1669 W. Simpson Hydrologia Chymica 284 Sudden floods filling the porosities and chanels of the superficies of the earth.

1720 J. Quincy tr. N. Hodges Loimologia ii. 55 Hence it comes strongly to be conjectured, how the pestilential Seminium comes to be hid so secretly in the Porosities of the Air.

1831 R. Knox tr. H. Cloquet Syst. Human Anat. (ed. 2) 15 Found in the interstices of the laminæ of the compact tissue, and the porosities with which they seem perforated.

1984 E. P. DeGarmo et al. Materials & Processes in Manuf. (ed. 6) xi. 261 Air in the mold before pouring..must be allowed to escape, rather than be trapped in the casting as porosity or blow holes.

This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).

单词	porosity
释义	porosityn. Brit. /pɔːˈrɒsᵻti/, U.S. /pəˈrɑsədi/, /poʊˈrɑsədi/ Forms: Middle English porrosite, Middle English 1600s porosite, 1500s porositye, 1500s porrositie, 1500s–1600s porositie, 1600s– porosity. Origin: Of multiple origins. Partly a borrowing from French. Partly a borrowing from Latin. Etymons: French porosité; Latin porositas. Etymology: < Middle French porosité, porrosité quality or state of being porous, porous part or structure (1314 in Old French; French porosité quality or state of being porous) and its etymon post-classical Latin porositas quality or state of being porous (from c1200 in British sources), porous part or structure (1363 in Chauliac; compare quot. ?a1425 at sense 2) < porosus porous adj. + classical Latin -tās (see -ty suffix¹; compare -ity suffix). Compare Catalan porositat (1491), Spanish porosidad (a1450 as porosidat), Italian porosità (mid 14th cent.). 1. The quality or state of being porous; porous consistency. Also: the degree to which a substance is porous. ΘΚΠ the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > small opening > minute hole > quality of being full of plumminessa1398 porositya1398 spongiosity?1541 spongiousness1598 sponginess1610 poriness1653 porousness1653 porishness1670 poroseness1679 pore1756 a1398 J. Trevisa tr. Bartholomaeus Anglicus De Proprietatibus Rerum (BL Add.) f. 30 Porosite [L. porositatem] of þe tree drawiþ þe fumosite from þe rinde. c1475 ( Surg. Treat. in MS Wellcome 564 f. 18^v (MED) Þe brayn panne..is spongeous in þe myddil; þer beþ assigned þre causis: The firste, þat þe fumositees of þe brayn myȝte þe bettere passe out bi þe porrosite..The iij is þat bi his porrosite þe blood þat is norischinge to þe brayn schulde be þe bettere kept. 1615 H. Crooke Μικροκοσμογραϕια 385 This porosite also makes their vpper face smooth, and bedewed with a kind of slimy moisture. 1681 N. Grew Musæum Regalis Societatis ii. i. v. 213 Unciam densus, saith Clusius improperly; that word not expressing the Dimention, but closeness or little porosity of a Body. 1752 Philos. Trans. 1749–50 (Royal Soc.) 46 181 The moderate Heat..allows the Glass to acquire its due consistence in this state of middling Porosity. 1794 R. Kirwan Elements Mineral. (ed. 2) I. 231 It is the porosity of this stone that renders it so light. 1841 Brit. & Foreign Med. Rev. 12 158 Osteoporosis, or porosity of bone, is formed by a loosening of the tissue. 1876 J. Tyndall Fragm. Sci. (ed. 5) i. v. 176 In virtue of its extreme porosity, a similar power is possessed by charcoal. 1953 R. W. Fairbrother Text-bk. Bacteriol. (ed. 7) vi. 66 Seitz filters are asbestos discs..made in two grades of porosity: ‘K’ for clarifying, and ‘EK’ for removing bacteria. 1975 G. Anderson Coring i. 2 Porosity is a measure of the space in a rock not occupied by the solid structure or framework of the rock. It is defined as the fraction of the total bulk volume of the rock not occupied by solids. 1990 Sci. Amer. May 77/2 The decelerating force and air friction, which together are known as drag, can be controlled by changing a parachute's geometry and porosity. 2. A porous part or structure; an interstice, a pore; pores collectively. Usually in plural. ΘΚΠ the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > small opening > minute hole > quality of being full of > porous part or thing porosity?a1425 spongiosity1543 porousness1644 poriness1653 sponge1682 ?a1425 tr. Guy de Chauliac Grande Chirurgie (N.Y. Acad. Med.) f. 172 (MED) Restrictif medicyne of blode..gleweþ & stoppeþ þe porositeez [L. porositates] of þe membrez. 1598 A. M. tr. J. Guillemeau Frenche Chirurg. 9 b/2 The Diploe, that is, the porositye which is betweene them bothe [sc. tables of the skull]. 1669 W. Simpson Hydrologia Chymica 284 Sudden floods filling the porosities and chanels of the superficies of the earth. 1720 J. Quincy tr. N. Hodges Loimologia ii. 55 Hence it comes strongly to be conjectured, how the pestilential Seminium comes to be hid so secretly in the Porosities of the Air. 1831 R. Knox tr. H. Cloquet Syst. Human Anat. (ed. 2) 15 Found in the interstices of the laminæ of the compact tissue, and the porosities with which they seem perforated. 1984 E. P. DeGarmo et al. Materials & Processes in Manuf. (ed. 6) xi. 261 Air in the mold before pouring..must be allowed to escape, rather than be trapped in the casting as porosity or blow holes. This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022). < n.a1398
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