A drop of water of diameter 0. 2–0. 5 mm (0. 008–0. 02 in. ) falling usually (but not always) from low stratus or stratocumulus cloud. Although this is the correct term for this size range, all water drops of diameter greater than 0. 2 mm are frequently termed raindrops, as opposed to cloud drops. Should such drops reach the ground, they can be felt on the upturned face.