The velic is the entrance from the upper part of the pharynx into the nasal cavity. [...] it is either closed, so that air cannot pass between pharynx and nasal cavity, or open. Sounds produced with the velic open are called ‘nasal’ or ‘nasalized’; those produced with the velic closed are called ‘nonnasal’ or ‘oral’. - Hockett (1958), a pag.66-67