plural of hairstreak

A hairdresser.

A spring, made of a coil of fine wire, that is used to regulate the movement of a balance wheel in a watch.

plural of hairspring

plural of hairstylist

A stickler person who makes extremely, possibly excessively, fine distinctions (who would separate something as fine as a hair into two pieces and distinguish them).

plural of hairsplitter

The act of considering or arguing about fine details, or worrying about minutiae.

present participle of hairsplit

Alternative form of hair spray