| Name: | photoreceptor outer segment layer | 
|---|---|
| Synonyms: | photoreceptor outer segment layers | 
| Definition: | Layer of the retina composed of the outer segments of the photoreceptor cells. The photoreceptor outer segment is a specialized primary cilium consisting of a microtubule-based axoneme and regular stacks of membrane folds or disks containing the photopigments (opsins) required for the phototransduction cascade. | 
| Ontology: | Anatomy Ontology [ZFA:0001466] | 
| Name: | cell | 
|---|---|
| Synonyms: | cells | 
| Definition: | Anatomical structure that has as its parts a maximally connected cell compartment surrounded by a plasma membrane. | 
| Ontology: | Anatomy Ontology [ZFA:0009000] |