Lexic.us

Definition of Retinal cone

1. Noun. A visual receptor cell in the retina that is sensitive to bright light and to color.

Medical Definition of Retinal cone

1. One of the two photoreceptor cell types in the vertebrate retina. In cones the photopigment is in invaginations of the cell membrane of the outer segment. Cones are less sensitive to light than rods, and are differentially sensitive to particular wavelengths of light and therefore important for colour vision. They provide vision with higher spatial and temporal acuity, and it is the combination of signals from cones with different pigments that facilitates colour vision. There are three types of cones, each type sensitive to red, green or blue. Present in large numbers in the fovea. (03 Jul 1999)

Lexicographical Neighbors of Retinal Cone

Literary usage of Retinal cone

Below you will find example usage of this term as found in modern and/or classical literature:

1. Appletons' Annual Cyclopædia and Register of Important Events of the Year (1891)
"... leads up to plurality of function with unity .if structure, the unity being represented by a simple structural element—lie it retinal cone or ..."

2. The New International Encyclopædia edited by Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby (1903)
"We may regard the pressure spot as tlie unit of cutaneous extent, as the retinal cone is that of visual extent. The limen of pressure separation, ..."

3. Harvard Psychological Studies by Harvard Psychological Laboratory (1922)
"... the isolated stimulation of a single retinal cone appears* to be at least a theoretical possibility, since the recent analyses 6lC ..."

4. The New International Encyclopaedia by Herbert Treadwell Wade (1922)
"We shall do better, perhaps, to consider the retinal cone as affording the unit of visual extent; although, as is shown later in this article, ..."

5. Geometrical Optics by Archibald Stanley Percival (1913)
"When, for instance, stars are observed through a telescope, their apparent size is not increased, for their image does not extend beyond one retinal cone, ..."

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