† periphraxyn.

Origin: A borrowing from German, combined with an English element. Etymons: German Periphraxis , -y suffix³.

Etymology: < German Periphraxis (J. B. Listing 1862, in Abhandlungen der mathematischen Classe der Königlichen Gesellschaft der Wissenschaften zu Göttingen 10 135) < Byzantine Greek περίϕραξις a fencing round < ancient Greek περι- peri- prefix + ϕράξις barricade, fencing in of an enclosure ( < the stem of ϕράσσειν (Attic ϕράττειν ) to fence in (see phragma n.) + -σις -sis suffix), after περιϕράσσειν to fence, fortify all round; see -y suffix³. Compare periphractic adj. N.E.D. (1905) gives the pronunciation as (pe·rifræksi) /ˈpɛrɪfræksɪ/.

Geometry. Obsolete.

The property of being periphractic.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > property or quality of

periphraxy1881

primitivity1890

1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 23 The whole number of lines to be drawn to remove the periphraxy is equal to the periphractic number or the number of internal surfaces.

1895 H. Lamb Hydrodynamics 70 For spaces of two dimensions, periphraxy and multiple-connectivity become the same thing.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2020).

单词	periphraxy
释义	† periphraxyn. Origin: A borrowing from German, combined with an English element. Etymons: German Periphraxis , -y suffix³. Etymology: < German Periphraxis (J. B. Listing 1862, in Abhandlungen der mathematischen Classe der Königlichen Gesellschaft der Wissenschaften zu Göttingen 10 135) < Byzantine Greek περίϕραξις a fencing round < ancient Greek περι- peri- prefix + ϕράξις barricade, fencing in of an enclosure ( < the stem of ϕράσσειν (Attic ϕράττειν ) to fence in (see phragma n.) + -σις -sis suffix), after περιϕράσσειν to fence, fortify all round; see -y suffix³. Compare periphractic adj. N.E.D. (1905) gives the pronunciation as (pe·rifræksi) /ˈpɛrɪfræksɪ/. Geometry. Obsolete. The property of being periphractic. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > property or quality of periphraxy1881 primitivity1890 1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 23 The whole number of lines to be drawn to remove the periphraxy is equal to the periphractic number or the number of internal surfaces. 1895 H. Lamb Hydrodynamics 70 For spaces of two dimensions, periphraxy and multiple-connectivity become the same thing. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2020). < n.1881
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