diastema

A gap or space between two adjacent teeth, especially the upper front incisors (in humans).

A gormless-looking boy, thin and exhibiting diastemata in the shop-front lights, offered him English newspapers.

A gap between teeth of different types, e.g. incisors and molars, which is a feature of some rodents and ungulates.

Any abnormal space, fissure, or cleft in an organ or other part of the body.

The modified protoplasm at the equator of a cell, existing before mitotic division.