1) The eating of hair or wool 
Trichophagia (τριχοφαγία, from τρίχα, tricha `hair” + φάγειν, phagein `to eat”) is the compulsive eating of hair associated with trichotillomania (hair pulling). In trichophagia, people with trichotillomania also ingest the hair that they pull; in extreme (and rare) cases this can lead to a hair ball (trichobezoar). ==...
The eating of hair or wool. ... (05 Mar 2000) ... 
(trik″o-fa´jә) the habit of eating hair, a form of pica.
Type: Term Pronunciation: trik′ō-fā′jē-ă Definitions: 1. The eating of hair or wool.
trichophagia, trichophagy The practice, or habit, of biting or eating hair or wool.