tricho-, trich-, -tricha, -trichia, -trichan, -trichic, -trichosis, -trichous, -thrix, -trichum, -trichy +

(Greek: hair [thread; filament; condition of the hair])

hypertrichophobia (s) (noun) (no plural)
An abnormal dislike of excessive hair on the body: Joe, suffering from hypertrichophobia, was oversensitive about the growth of whiskers on his face and the growth of such threadlike structures on his chest and back, so he shaved twice a day and had the other growths removed regularly!
hypertrichophrydia
An excessive growth of the eyebrows or having excessively hairy eyebrows.
hypertrichosis universalis
1. Generalizes excessive growth of hair where hair normally grows.
2. The superfluous presence of hair.
3. Excessive growth of the hair; also called polytrichia and polytrichosis.

Here is a special article about the X-ray treatment of hypertrichosis.

hypertricosis, hypertrichiasis
1. A medical condition referring to excessive body hair, either affecting most of the torso and limbs, or localized to an area of skin; such as the face and neck also called "werewolf syndrome" or "human-werewolf syndrome".
2. The growth of hair in any pattern which is excessive for the age, sex, and the race of the subject or person.
hypotrichia
A congenital deficiency of hair.
hypotrichiasis
A less than normal amount of hair on the head and/or body. Synonyms: hypotrichiasis, oligotrichia, oligotrichosis.
hypotrichosis
1. Congenital deficiency or sparsity of hair.
2. Diminished growth of hair.
hypotrichous
A reference to the Hypotricha, an order of the class Ciliata of Protozoa, having the locomotive cilia confined to the ventral (stomach) surface.
kymotrichous
A variation in spelling of cymotrichous; having wavy hair.
Leiotrichi
The division of mankind which embraces the smooth-haired races.

In anthropology, a description of the races of people distinguished by their smooth hair. Races with hair that is not smooth are referred to as Ulotrichi.

leiotrichous
Having straight and smooth, or nearly smooth, hair.
leiotrichy
Having straight and smooth, or nearly smooth, hair.
leipotrichia
A loss of hair.
Lepidotrichium (s), Lepidotrichia (pl)
Lepidotrichia are bony, bilaterally-paired, segmented fin rays found in bony fishes.

They develop around actinotrichia as part of the dermal exoskeleton. Lepidotrichia may also have some cartilage or bone in them. They are actually segmented and appear as a series of disks stacked on top of each other.

lepothrix
1. A condition in which the shaft of the hair is encased in hardened, scaly, sebaceous matter.
2. A skin disorder in which masses of reddish, black, and yellow fungous material are found in nodular or diffuse distribution about the axillary or genital hair; usually seen in those who sweat freely.