22-letter words containing f, a, r, c, e, u
- user network interface — (communications, networking) (UNI) An interface point between ATM end users and a private ATM switch, or between a private ATM switch and the public carrier ATM network. The physical and protocol specifications for UNIs are defined by the ATM Forum's UNI documents, which allow for various types of physical interfaces. See also: NNI
- valvular insufficiency — abnormal closure of a heart valve resulting in failure to prevent regurgitation of blood.