laminaradj.

Brit.

/ˈlamᵻnə/,

/ˈlamn̩ə/, U.S.

/ˈlæmənər/

Etymology: < lamina n. + -ar suffix¹. Compare French laminaire.

1. Consisting of or arranged in laminæ, thin plates, or layers.

ΘΚΠ

the world > space > relative position > condition of being external > covering > a layer > [adjective] > thin

foliated1650

laminated1665

foliate1683

leafy1684

lamellated1713

foliaceousa1728

squamousa1728

lamellose1752

lamellar1794

spathaceous1794

laminous1798

spathose1802

lamellous1803

spathic1803

laminar1811

lamellate1826

laminose1826

laminary1830

lamelliferous1832

laminiferous1834

the world > space > shape > condition of being broad in relation to thickness > [adjective] > having form of thin plate or layer

leaved1559

laminate1668

lamelliform1819

laminal1825

laminiform1834

laminar1845

1811 J. Pinkerton Petralogy I. 220 Laminar pitch-stone, in thin horizontal layers.

1845 G. Petrie Round Towers Ireland ii. iii. 210 Bracteati—by which is understood, thin laminar pieces, usually of silver.

1854 S. P. Woodward Man. Mollusca ii. 214 Discina and Lingula consist almost entirely of a horny animal substance, which is laminar.

1875 C. C. Blake Zoology 202 Gills laminar, with a small proportion of the border free.

1876 J. Harley Royle's Man. Materia Med. (ed. 6) 75 Soft laminar crystals.

a. Physics. Of the flow of a fluid: smooth and regular, the direction of motion at any point remaining constant as if the fluid were moving in a series of layers sliding over one another without mixing; occasionally restricted to the case in which the layers are plane (cf. lamellar adj. 2).

ΚΠ

1895 H. Lamb Hydrodynamics iii. 34 This analysis may be illustrated by the so-called ‘laminar’ motion of a liquid.

1949 H. F. P. Purday Streamline Flow i. 6 In laminar flow in the strict use of the term, the fluid moves in a system of parallel planes, the velocity having everywhere the same direction, but the magnitude of the velocity is a function of the distance from some fixed plane of the system. The motion is not necessarily steady; it may, for instance, be periodic.

1965 D. A. Gilbrech Fluid Mech. (1966) vi. 265 In general, laminar flow occurs at low velocities, between close boundaries, when the fluid is very viscous, and when the fluid is of low density.

1968 R. Passmore & J. S. Robson Compan. Med. Stud. I. xxix. 8/2 Flow of gas through tubes is laminar at slow speeds, but at faster rates of flow molecular collisions set up eddies and the flow is then turbulent.

b. transferred. Applied to a body whose shape is such as to produce a laminar flow of fluid in the boundary layer round it (at normal speeds).

ΚΠ

1955 J. Kestin tr. H. Schlichting Boundary Layer Theory xiii. 229 The prevention of transition on laminar aerofoils.

1963 Ann. Reg. 1962 390 Handley Page continued the development of their laminar wing project, in which hundreds of small slits in an aircraft wing were used to suck air away from the so-called boundary layer around the wing and thus to reduce friction and hence fuel costs.

This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022).

单词	laminar
释义	laminaradj. Brit. /ˈlamᵻnə/, /ˈlamn̩ə/, U.S. /ˈlæmənər/ Etymology: < lamina n. + -ar suffix¹. Compare French laminaire. 1. Consisting of or arranged in laminæ, thin plates, or layers. ΘΚΠ the world > space > relative position > condition of being external > covering > a layer > [adjective] > thin foliated1650 laminated1665 foliate1683 leafy1684 lamellated1713 foliaceousa1728 squamousa1728 lamellose1752 lamellar1794 spathaceous1794 laminous1798 spathose1802 lamellous1803 spathic1803 laminar1811 lamellate1826 laminose1826 laminary1830 lamelliferous1832 laminiferous1834 the world > space > shape > condition of being broad in relation to thickness > [adjective] > having form of thin plate or layer leaved1559 laminate1668 lamelliform1819 laminal1825 laminiform1834 laminar1845 1811 J. Pinkerton Petralogy I. 220 Laminar pitch-stone, in thin horizontal layers. 1845 G. Petrie Round Towers Ireland ii. iii. 210 Bracteati—by which is understood, thin laminar pieces, usually of silver. 1854 S. P. Woodward Man. Mollusca ii. 214 Discina and Lingula consist almost entirely of a horny animal substance, which is laminar. 1875 C. C. Blake Zoology 202 Gills laminar, with a small proportion of the border free. 1876 J. Harley Royle's Man. Materia Med. (ed. 6) 75 Soft laminar crystals. 2. a. Physics. Of the flow of a fluid: smooth and regular, the direction of motion at any point remaining constant as if the fluid were moving in a series of layers sliding over one another without mixing; occasionally restricted to the case in which the layers are plane (cf. lamellar adj. 2). ΚΠ 1895 H. Lamb Hydrodynamics iii. 34 This analysis may be illustrated by the so-called ‘laminar’ motion of a liquid. 1949 H. F. P. Purday Streamline Flow i. 6 In laminar flow in the strict use of the term, the fluid moves in a system of parallel planes, the velocity having everywhere the same direction, but the magnitude of the velocity is a function of the distance from some fixed plane of the system. The motion is not necessarily steady; it may, for instance, be periodic. 1965 D. A. Gilbrech Fluid Mech. (1966) vi. 265 In general, laminar flow occurs at low velocities, between close boundaries, when the fluid is very viscous, and when the fluid is of low density. 1968 R. Passmore & J. S. Robson Compan. Med. Stud. I. xxix. 8/2 Flow of gas through tubes is laminar at slow speeds, but at faster rates of flow molecular collisions set up eddies and the flow is then turbulent. b. transferred. Applied to a body whose shape is such as to produce a laminar flow of fluid in the boundary layer round it (at normal speeds). ΚΠ 1955 J. Kestin tr. H. Schlichting Boundary Layer Theory xiii. 229 The prevention of transition on laminar aerofoils. 1963 Ann. Reg. 1962 390 Handley Page continued the development of their laminar wing project, in which hundreds of small slits in an aircraft wing were used to suck air away from the so-called boundary layer around the wing and thus to reduce friction and hence fuel costs. This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022). < adj.1811
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