1) Free software programmed in C 2) Genus avahi 3) Madagascan lemur 4) Mammal genus 
[software] Avahi is a free zero-configuration networking (zeroconf) implementation, including a system for multicast DNS/DNS-SD service discovery. It is licensed under the GNU Lesser General Public License (LGPL). Avahi is a system which enables programs to publish and discover services and hosts running on a local network. For example, a u...
long-legged arboreal lemur of Madagascar. Avahis have short arms, a short muzzle, and a round head with small ears hidden in woolly fur. Nocturnal ...
[n] - a genus of Indriidae
genus Avahi noun a genus of Indriidae