a yellowish carotenoid, C20H28O, liberated when rhodopsin or iodopsin is transformed by the action of light
3.
a similar carotenoid, C20H26O, formed by the action of light on porphyropsin
Examples of 'retinal' in a sentence
retinal
A retinal memory of the flash of light from the airliner's impact gleamed on the map that he tugged from inside his thick shirt.
Thomas, Craig THE LAST RAVEN (2002)
Different fingerprints, retinal patterns, of course; embryos have some autonomy when they develop.
Greg Bear VITALS (2002)
All related terms of 'retinal'
retinal rod
any of the elongated cylindrical cells in the retina of the eye, containing the visual purple ( rhodopsin ), which are sensitive to dim light but not to colour
retinal cone
a geometric solid consisting of a plane base bounded by a closed curve , often a circle or an ellipse , every point of which is joined to a fixed point, the vertex , lying outside the plane of the base. A right circular cone has a vertex perpendicularly above or below the centre of a circular base. Volume of a cone: 1 ⁄ 3 π r 2 h, where r is the radius of the base and h is the height of the cone
retinal rivalry
the phenomenon whereby one is unable to see simultaneously different images presented one to each eye ; usually in some areas of the eye the image presented to the left eye is seen, in others that presented to the right eye
rod
A rod is a long, thin metal or wooden bar .
cone
A cone is a shape with a circular base and smooth curved sides ending in a point at the top.
binocular rivalry
the phenomenon whereby one is unable to see simultaneously different images presented one to each eye ; usually in some areas of the eye the image presented to the left eye is seen, in others that presented to the right eye