Thin layer of ice extruded from a plant.
1The tiny kerosene lamp burned in the window, but the frost flowers bloomed on the window-panes.
2She paused at the window and traced her finger over the glass, covering it with frost flowers.
3Tate and me has given Joyce a real smart white dress, and she's trimmed her old hat all up with little frost flowers.
4The little round hat was gracefully wound with frost flowers until it looked like a wreath upon the pale gold of the glorious hair.