oylet
孔眼
Oil·let n. Arch. (a) A small opening or loophole, sometimes circular, used in mediaeval fortifications. (b) A small circular opening, and ring of moldings surrounding it, used in window tracery in Gothic architecture. [Written also oylet.]
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Oy·let n.
1. See Eyelet.
2. Arch. Same as Oillet.
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