From French collerette.
collarette (plural collarettes)
- A small collar, especially as a kind of necklace of lace, fur etc. for women.
- A type of dahlia having a small collar of short inner petals.
- The jagged circle in the mid-diameter of the iris, separating the darker shade of the iris from the lighter shade of the iris.
- Rim of loosened keratin surrounding a skin lesion.