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A species of rose (Rosa Eglanteria), with fragrantfoliage and flowers of different colours.
The sweetbrier (R. Rubiginosa).
Milton, in the next lines, has applied the name to some twinning plant, probably the honeysuckle. "Through the sweetbrier, or the vine, Or the twisted eglantine." (L'Allegro, 47) "In our early writers and in Gerarde and the herbalists, it was a shrub with white flowers."
Origin: F. Eglantine, fr. OF. Aiglent brier, hip wood, fr. (assumed) LL. Acuculentus, fr. A dim. Of L. Acus needle; cf. F. Aiguille needle. Cf. Aglet.
Source: Websters Vocabulary