hemautography

from The Century Dictionary.

• noun A method of recording variations in blood-pressure, by which an incision is made into an artery and the escaping jet of blood is directed against a moving strip of paper.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Physiol.) The obtaining of a curve similar to a pulse curve or sphygmogram by allowing the blood from a divided artery to strike against a piece of paper.