ulo- +

(Greek: wooly; curly)

ulotrichan (adjective), more ulotrichi, most ulotrichi
Pertaining to one of the archaic classification of Ulotrichi: The ulotrichan people are characterized by their hair that is wooly and tightly curled
Ulotrichi (s) (proper noun)
The division of mankind which embraces the races having woolly or crispy hair: In Jack's anthropology book, he read about the Ulotrichi as a certain race of people having tightly curled hair and that looked quite fuzzy, like wool.

In anthropology, Ulotrichi relates to Huxley's classification of the races having woolly or crispy hair.

Thomas Henry Huxley (1825-1895) was a British biologist.

ulotrichous (adjective), more ulotrichous, most ulotrichous
Belonging to a group of people having woolly or crisply curly hair: Mary's boyfriend was thought to be a ulotrichous teenager because of his hair that was naturally tightly curled,
ulotrichy (s) (noun) (no pl)
The quality of possessing woolly or crispy hair: In the magazine at the hairdresser's, Sally found an article about ulotrichy which described people with naturally tightly curled hair, and some of them wanting so much to have very straight hair!