1) Bird genus 2) Genus hirundo 
The bird genus Hirundo is a group of passerines in the family Hirundinidae (swallows and martins). These are the typical swallows, including the widespread barn swallow. Many of this group have blue backs, red on the face and sometimes the rump or nape, and whitish or rufous underparts. With fourteen species this genus is the largest in its family...
• (n.) A genus of birds including the swallows and martins.
Hi·run'do noun [ Latin , swallow.] (Zoology) A genus of birds including the swallows and martins. 
[n] - type genus of the Hirundinidae
Variant of the Agusta 109 helicopter
genus Hirundo noun type genus of the Hirundinidae