rod

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Related to Rods: Rods and cones

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 ?
He felt their frustration of just not having enough choices for quality rods. So he began saving his guiding fees and ultimately started ACC Crappie Stix, named after his guide business.
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President of Bangladesh Auto Re-Rolling and Steel Mills Association Manowar Hossen told the briefing that the main raw materials of rod is scrap.
Bigger than I thought - for as I tried to yank it through to bring it down near the reel and untangle it, the top joint of the rod snapped.
There are countless step-by-step how-to videos online from reputable companies such as Mud Hole Rod Building & Tackle Crafting (mudhole.com) on what you need and how to repair your beloved fishing rod.
Therefore, this paper will make further improvement by considering all the main effects together in order to develop software to calculate the control rod's drop-down time more accurately.
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The UNiD Cervical Rod technology removes this existing surgical barrier by creating two strictly identical single or dual-diameter rods manufactured specifically for the patient and delivered directly to the Operating Room.
An angling friend who noticed my predicament offered me an exchange of rods; he had a 10-foot Hardy's cane rod.