Botany:
* The iris bloomed in a vibrant shade of purple, adding a splash of color to the garden.
* The iris is a popular flower known for its elegant, sword-like leaves.
Anatomy:
* The iris of the eye controls the amount of light that enters the pupil.
* Dilated irises are a sign of fear or excitement.
Other:
* The photographer used a special lens to capture the intricate patterns of the iris.
* The iris of her eye sparkled with mischief.
* The artist used a brushstroke that resembled the delicate petals of an iris.
You can also use "iris" as a verb:
* The iris of the camera adjusts to the changing light conditions.