rod


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rod

 [rod]
1. a straight, slim mass of substance.
2. one of two types of visual cells, cylindrical segments that contain rhodopsin; together with the cones they form the light-sensitive elements of the retina. See also eye and vision. Called also retinal rod.
Corti's r's pillar cells.
Harrington rod a rigid contoured metal rod used in Harrington instrumentation.
olfactory rod the slender apical portion of an olfactory bipolar neuron, a modified dendrite extending to the surface of the epithelium.
retinal rod rod (def. 2).

rod

(rod),
1. A slender cylindric structure or device.
2. The photosensitive, outward-directed process of a rhodopsin-containing rod cell in the external granular layer of the retina; many millions of such rods, together with the cones, form the photoreceptive layer of rods and cones. Synonym(s): rod cell of retina
[A.S. rōd]

rod

(rŏd)
n.
1. Anatomy Any of various rod-shaped cells in the retina that respond to dim light. Also called rod cell.
2. Microbiology An elongated bacterium; a bacillus.

rod

Orthopedics A metal fixation device used to stabilize fractures. See Harrington rod.

rod

(rod)
1. A straight, slender, cylindric structure or device. For surgical rods, see nail;pin
2. The photosensitive, outward-directed process of a rhodopsin-containing rod cell in the external granular layer of the retina; many millions of such rods, together with the cones, form the photoreceptive layer of rods and cones.
Synonym(s): rod cell.
[A.S. rōd]

rod

or

rod cell

a rod-shaped, light-sensitive cell lying in the more peripheral parts of the RETINA in the vertebrate eye. Rods are particularly associated with vision under conditions of low illumination and they occur in large numbers in nocturnal animals. They are not capable of colour discrimination and their visual acuity is poor (compare CONE CELL). RHODOPSIN (visual purple) is found in rods. There are some 240 million rods in the retinas of a primate.see RETINAL CONVERGENCE.

Rod

Photoreceptor that is highly sensitive to low levels of light and transmits images in shades of gray.
Mentioned in: Color Blindness

rod

(rod)
1. A straight, slender, cylindric structure or device.
2. The photosensitive, outward-directed process of a rhodopsin-containing rod cell in the external granular layer of the retina.
[A.S. rōd]
References in periodicals archive ?
Rod would retrieve his equipment later, and it would be a few more days before he decided to chance hunting the spot again.
Most of the rod kohi areas (28.5 million hectare) lies in Baluchistan (Nespak, 1998), locally named as Sailaba, where the low rainfalls (50-250 mm) produce less runoff water, thus need more careful management for achieving greater production.
The service model for the UNiD Cervical Rod follows the same effective collaboration between Medicrea's UNiD Lab and Spinal Surgeons worldwide, which has surpassed the creation of custom UNiD Thoracolumbar Rods for more than 650 implantations to date.
An angling friend who noticed my predicament offered me an exchange of rods; he had a 10-foot Hardy's cane rod.
Stunned Eddie Going, 29, posted a picture of the suspected impersonator on Instagram as he sat on a subway train passing over Manhattan Bridge with the caption: "Wait, is that Rod Stewart?" One New York tweeter, known as Lisa B, wrote: "I've seen the Rod Stewart imposter in VIP lounge at JFK.
A little later, and after Rod's whereabouts had been discovered, he was visited by his sisters Gill and Jan who remarked at how peaceful he looked.
In honor of Key, the Electronic Document Systems Foundation (EDSF) has created the Rod Key Memorial Scholarship.
THESE OP RODS NEED TO BE INSPECTED FOR BENDS, BREAKS, BURRS OR CRACKS.
Rod unit for the treatment of long bone fractures (No.FAP 20110033) contains a bone rods 1, screws 2, threaded rods 3 parallel to each other and connected by half-braces 4.
This year marks the 25th anniversary of the first presentation of the Rod Leyburn Memorial Trophy.
As Rod himself said years later: "I've always thought that I was very lucky because that bomb fell just a stone's throw from where I lived."
I found the rod's action and feel to be extraordinary.