bow
A wooden stick with horsehair stretched from end to end; by means of friction, it makes the strings of an instrument vibrate.
head 
The upper end of the bow.
handle 
Part held when the bow is used.
hair 
Part of the bow consisting of horsehair that is rubbed across the strings to make them vibrate.
point 
Part that secures the horsehair to the upper end of the bow.
screw 
Threaded piece that moves the frog.
frog 
Sliding part that secures the hair to the lower end of the bow; the frog is moved to adjust the tension of the hair.
heel 
The lower end of the bow.
stick 
Thin flexible rod curved along a third of its length and along which hair is stretched.