1) Congenital absence of teeth 2) Developmental tooth pathology 1) Edentia 
In dentistry, anodontia, also called anodontia vera, is a rare genetic disorder characterized by the congenital absence of all primary or permanent teeth. It is associated with the group of skin and nerve syndromes called the ectodermal dysplasias. Anodontia is usually part of a syndrome and seldom occurs as an isolated entity. Anodontia is the co...
toothlessness
the developmental absence of teeth.
Congenital absence of the teeth; it may involve all (total anodontia) or only some of the teeth (partial anodontia, hypodontia), and both the deciduous and the permanent dentition, or only teeth of the permanent dentition. ... (12 Dec 1998) ... 
(an″o-don´shә) congenital absence of some or all of the teeth; called also edentia.
Type: Term Pronunciation: an′ō-don′shē-ă Definitions: 1. Congenital absence of the teeth; developmental, not due to extraction or impaction. Synonyms: agomphosis, agomphiasis
anodontia A congenital absence of the teeth other than by extraction or impaction.
congenital absence of teeth.