sweetbrier, sweetbriar, or eglantine [O. Fr. from Lat.,=needle], wild rose of Europe (Rosa eglanteria), cultivated and now naturalized in the United States. The bush has fragrant foliage, and in the spring it has pink blossoms (usually single), which are followed by rose hips sometimes used in preserves. Sweetbrier is classified in the division Magnoliophyta, class Magnoliopsida, order Rosales, family Rosaceae.