permeantadj.n.

Brit.

/ˈpəːmɪənt/, U.S.

/ˈpərmiənt/

Origin: A borrowing from Latin. Etymons: Latin permeant-, permeāns.

Etymology: < classical Latin permeant-, permeāns, present participle of permeāre permeate v. Compare later permeate v.With sense A. 3 compare earlier impermeant adj.; compare also French perméant ( L. Errera Cours de physiol. moléculaire (1907) 91).

A. adj.

1. Permeating; diffusing, passing, or capable of diffusing or passing through something. Now rare.

ΘΚΠ

the world > movement > motion in a certain direction > movement over, across, through, or past > [adjective] > through > permeating

permeant1646

permeative1657

permeable1661

permeating1661

perviousa1677

1646 Sir T. Browne Pseudodoxia Epidemica ii. v. 85 Gold..entereth not the veynes with those electuaries, wherein it is mixed, but taketh leave of the permeant parts, at the mouthes of the miseraicks.

1682 H. More Annot. Disc. Truth 242 in Two Choice & Useful Treat. Fire is a Substance permeant and existent in all mixt bodies on Earth.

1835 J. A. Heraud Descent into Hell (ed. 2) p. viii He deemed..to send The Spirit of his Being into all The permeant Elements,—and therewith blend.

1848 P. J. Bailey Festus (ed. 3) 216 One divine all permeant unity.

1877 J. S. Blackie Wise Men Greece 65 The power Of that fine flowing permeant element [sc. water].

1939 Times 22 Dec. 9/3 Yet Peace and law through all these permeant are.

2. Ecology. Of an animal: moving freely from one habitat or community to another. rare.

ΚΠ

1935 V. E. Shelford & S. Olson in Ecology 16 390 The minor permeant influents..exact a lesser toll from the vegetation.

1952 Ecol. Monogr. 22 110/2 Mammal species that may be considered as permeant residents of alpine elevations in the Uinta Mountains are extremely limited.

3. Physiology. Of an ion or molecule: that readily passes through a cell membrane.

ΚΠ

1963 H. Grundfest in D. Mazia & A. Tyler Gen. Physiol. of Cell Specialization iv. §3. xvii. 287 If the channels are fully open to their respective permeant ions, [etc.]

1974 J. B. Finean et al. Membranes & Cellular Functions ii. 31 Exchange diffusion describes the rapid exchange of permeant molecules across a membrane by a mediation system.

2002 Amer. Jrnl. Physiol. 283 1454 These permeant divalent cations..increase the potency and maximal efficacy of ACh.

B. n.

1. Ecology. An animal that moves freely from one habitat or community to another.

ΚΠ

1935 V. E. Shelford & S. Olson in Ecology 16 376 Animals conceived of as ‘influents’ are defined as animals having very obvious effects on the plants or animals of the community and on the habitat... Ranging influents may be called permeants.

1948 Ecol. Monogr. 18 490/1 Birds are in the main permeants in all the layer societies represented in the community.

1967 Ethnohistory 14 16 They..provide an extremely favorable environment for freshwater fish, and for such hydrosere permeants as moose, muskrat, mink, [etc.].

2. Physiology. An ion or molecule that readily passes through a cell membrane.

ΚΠ

1961 Jrnl. Gen. Physiol. 45 151 The solute flow..is related to the gradient of the osmotic pressure of the permeant.

1974 J. B. Finean et al. Membranes & Cellular Functions ii. 38 A variety of binding proteins which bind specific permeants have been released from some bacteria by osmotic shock procedures.

2001 Jrnl. Polymers & Environm. 9 49 Many polymers..are used as protective barrier films against the mass transport of small molecules of gases, vapors, and liquids (known as diffusates, permeants).

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	permeant
释义	permeantadj.n. Brit. /ˈpəːmɪənt/, U.S. /ˈpərmiənt/ Origin: A borrowing from Latin. Etymons: Latin permeant-, permeāns. Etymology: < classical Latin permeant-, permeāns, present participle of permeāre permeate v. Compare later permeate v.With sense A. 3 compare earlier impermeant adj.; compare also French perméant ( L. Errera Cours de physiol. moléculaire (1907) 91). A. adj. 1. Permeating; diffusing, passing, or capable of diffusing or passing through something. Now rare. ΘΚΠ the world > movement > motion in a certain direction > movement over, across, through, or past > [adjective] > through > permeating permeant1646 permeative1657 permeable1661 permeating1661 perviousa1677 1646 Sir T. Browne Pseudodoxia Epidemica ii. v. 85 Gold..entereth not the veynes with those electuaries, wherein it is mixed, but taketh leave of the permeant parts, at the mouthes of the miseraicks. View more context for this quotation 1682 H. More Annot. Disc. Truth 242 in Two Choice & Useful Treat. Fire is a Substance permeant and existent in all mixt bodies on Earth. 1835 J. A. Heraud Descent into Hell (ed. 2) p. viii He deemed..to send The Spirit of his Being into all The permeant Elements,—and therewith blend. 1848 P. J. Bailey Festus (ed. 3) 216 One divine all permeant unity. 1877 J. S. Blackie Wise Men Greece 65 The power Of that fine flowing permeant element [sc. water]. 1939 Times 22 Dec. 9/3 Yet Peace and law through all these permeant are. 2. Ecology. Of an animal: moving freely from one habitat or community to another. rare. ΚΠ 1935 V. E. Shelford & S. Olson in Ecology 16 390 The minor permeant influents..exact a lesser toll from the vegetation. 1952 Ecol. Monogr. 22 110/2 Mammal species that may be considered as permeant residents of alpine elevations in the Uinta Mountains are extremely limited. 3. Physiology. Of an ion or molecule: that readily passes through a cell membrane. ΚΠ 1963 H. Grundfest in D. Mazia & A. Tyler Gen. Physiol. of Cell Specialization iv. §3. xvii. 287 If the channels are fully open to their respective permeant ions, [etc.] 1974 J. B. Finean et al. Membranes & Cellular Functions ii. 31 Exchange diffusion describes the rapid exchange of permeant molecules across a membrane by a mediation system. 2002 Amer. Jrnl. Physiol. 283 1454 These permeant divalent cations..increase the potency and maximal efficacy of ACh. B. n. 1. Ecology. An animal that moves freely from one habitat or community to another. ΚΠ 1935 V. E. Shelford & S. Olson in Ecology 16 376 Animals conceived of as ‘influents’ are defined as animals having very obvious effects on the plants or animals of the community and on the habitat... Ranging influents may be called permeants. 1948 Ecol. Monogr. 18 490/1 Birds are in the main permeants in all the layer societies represented in the community. 1967 Ethnohistory 14 16 They..provide an extremely favorable environment for freshwater fish, and for such hydrosere permeants as moose, muskrat, mink, [etc.]. 2. Physiology. An ion or molecule that readily passes through a cell membrane. ΚΠ 1961 Jrnl. Gen. Physiol. 45 151 The solute flow..is related to the gradient of the osmotic pressure of the permeant. 1974 J. B. Finean et al. Membranes & Cellular Functions ii. 38 A variety of binding proteins which bind specific permeants have been released from some bacteria by osmotic shock procedures. 2001 Jrnl. Polymers & Environm. 9 49 Many polymers..are used as protective barrier films against the mass transport of small molecules of gases, vapors, and liquids (known as diffusates, permeants). This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < adj.n.1646
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