Medical Definition of mandibular angle. : an angle formed by the junction at the gonion of the posterior border of the ramus and the inferior border of the body of the mandible.
When a fully grown nail is atrophied, it loses its shine; loses healthy look, starts to shrink in size, and may eventually falls away. This condition is called Onychatrophia and also known as atrophy. There are number of degrees of onychatrophia condition. An individual can have only one nail that has atrophied. However, this condition can never worsen because the condition was identified and treated as soon as possible.
[edit on Wikidata] Nail biting, also known as onychophagy or onychophagia, is an oral compulsive habit. It is sometimes described as a parafunctional activity, the common use of the mouth for an activity other than speaking, eating, or drinking. Nail biting is very common, especially amongst children. Less innocent forms of nails biting, are considered an impulse control disorder in the DSM-IV-R, and is classified under obsessive-compulsive and related disorders in the DSM-5.