tooth fairy: a fairy that is said to leave money at night under a child's pillow to compensate for a baby tooth falling out
fairy: a small being, human in form, playful and having magical powers
babinski: extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons