Examlex
A trellis stream pattern consists of long parallel streams linked by short, right-angled segments.
Circular Opening
An opening or hole that is round in shape.
Iris
The colored part of the eye that controls the diameter and size of the pupil, thus regulating the amount of light that enters the eye.
Pupil
The opening in the center of the iris of the eye that adjusts size to control the amount of light reaching the retina.
Protective Covering
A layer or structure that serves to shield or guard an organism or part of an organism from harm or injury.
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