In a Word

https://www.google.com/patents/US4022227

calvity
n. baldness

One wonders if there’s a personal story behind this “method of concealing partial baldness,” patented by Donald and Frank Smith in 1977. The hair is grown to a length of 3 or 4 inches, divided into equal portions, and brushed over the bald area, using hair spray to hold it in place. “By lightly sweeping the hair into the desired style as the hair spray dries, an appearance of a full head of hair is given.”