Definition of Rods and cones. Meaning of Rods and cones. Synonyms of Rods and cones

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Definition of Rods and cones

Rods and cones
Rod Rod, n. [The same word as rood. See Rood.] 1. A straight and slender stick; a wand; hence, any slender bar, as of wood or metal (applied to various purposes). Specifically: (a) An instrument of punishment or correction; figuratively, chastisement. He that spareth his rod hateth his son. --Prov. xiii. 24. (b) A kind of sceptor, or badge of office; hence, figuratively, power; authority; tyranny; oppression. ``The rod, and bird of peace.' --Shak. (c) A support for a fishing line; a fish pole. --Gay. (d) (Mach. & Structure) A member used in tension, as for sustaining a suspended weight, or in tension and compression, as for transmitting reciprocating motion, etc.; a connecting bar. (e) An instrument for measuring. 2. A measure of length containing sixteen and a half feet; -- called also perch, and pole. Black rod. See in the Vocabulary. Rods and cones (Anat.), the elongated cells or elements of the sensory layer of the retina, some of which are cylindrical, others somewhat conical.

Meaning of Rods and cones from wikipedia

- mammalian eyes: rods, cones, and intrinsically photosensitive retinal ganglion cells. The two classic photoreceptor cells are rods and cones, each contributing...
- of music and art, both po****r and obscure. Its performers, known as Blue Men, have their skin painted blue. They are mute during shows and always appear...
- efficiency. Rods are much more common than cones, with about 120 million rod cells compared to 6 to 7 million cone cells. Like cones, rod cells have a...
- pigments. In cones, these disks are attached to the outer membrane, whereas they are pinched off and exist separately in rods. Neither rods nor cones divide...
- two types: rods and cones. Rods function mainly in dim light and provide monochromatic vision. Cones function in well-lit conditions and are responsible...
- comprising two types of photoreceptor cells. Rods are primarily responsible for dim-light scotopic vision and cones are primarily responsible for day-light...
- red-green and blue-yellow plates. Dystrophy of the light-sensing cells of the eye may also occur in the rods as well, or in both the cones and the rods. A type...
- elements composing the layer of rods and cones (Jacob's membrane) in the retina of the eye are of two kinds, rod cells and cone cells, the former being much...
- opsins are a subclass of ciliary opsins and mediate vision in vertebrates. They include the opsins in human rod and cone cells. They are often abbreviated to...
- directly. Cone cells and rods are connected through intermediate cells in the retina to nerve fibres of the optic nerve. When rods and cones are stimulated...