noun
1. of Australia and Polynesia; nests in tree cavities
• Syn: ↑tree martin, ↑Hirundo nigricans
• Hypernyms: ↑swallow
• Member Holonyms: ↑Hirundo, ↑genus Hirundo
2. bluish-green-and-white North American swallow; nests in tree cavities
• Syn: ↑white-bellied swallow, ↑Iridoprocne bicolor
• Hypernyms: ↑swallow
Useful english dictionary. 2012.