Definitions
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physiol.) A general name for the several coloring matters, red, green, yellow, etc., present in the inner segments in the cones of the retina, held in solution by fats, and slowly decolorized by light; distinct from the photochemical pigments of the rods of the retina.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology Any of several colouring matters, red, green, yellow, etc., present in the inner segments in the
cones of theretina , held insolution byfats , and slowlydecolorized bylight ; distinct from thephotochemical pigments of therods of the retina.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Ancient Greek colour + to show.
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