| indigo bunting, indigo bird or indigo finch | |
| —n | |
| a North American bunting, Passerina cyanea, the male of which is bright blue and the female brown | |
| indigo bird, indigo bird or indigo finch | |
| —n | |
| indigo finch, indigo bird or indigo finch | |
| —n | |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |