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out-edge
out-edge n.
Brit. 
/ˈaʊtɛdʒ/
, /ˈaʊtɛdʒ/U.S. /ˈaʊdˌɛdʒ/
/ˈaʊdˌɛdʒ/ΘΚΠ
the world > space > relative position > condition of being external > edge, border, or margin > [noun] > outer edge
fringea1639
rim1662
out-edge1760
1760 L. Sterne Life Tristram Shandy I. xiii. 76 To the very out-edge and circumference of that cirle [sic].
1991 Trans. Amer. Math. Soc. 326 359 We say that the terminal vertex u of the out-edge is associated to v.
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