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).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

rod

Orthopedics A metal fixation device used to stabilize fractures. See Harrington rod.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Rod

Photoreceptor that is highly sensitive to low levels of light and transmits images in shades of gray.
Mentioned in: Color Blindness
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

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]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
In addition, Stone Technical Services is also the appointed contractor managing structural and high level maintenance repairs and lightning conductor installations on St Paul's Cathedral and works with other large organisations, such as the National Trust, and industrial companies including BASF at Seal Sands and Cummins in Darlington.
Earlier this month, part of the lightning conductor at Portland House Nursery in Lindley was stolen.
Experts have blamed such casualties to deforestation and loss of taller trees like palms as these are used to act as lightning conductors. In 2016, Bangladesh declared lightning as a natural disaster when the official toll topped 200 deaths, with 82 people dying on a single day in May.
Meteorology experts say school buildings are being hit because they don't have lightning conductors and are built on high ground.
Thieves, who also target school roofs and power lines, have been stealing the lead from church roofs, flashing and copper piping, and lightning conductors.
Copper lightning conductors, bells and statues have also been stolen.
There's not many shows out there who tell you they're going to shower you with blood, various other fluids and the odd all-too-real fake limb or two And I doubt there's any who will call on you to come up on stage to tease the skin of Gary Stretch several inches away from his bony body or watch the Wasp Boy do some sickening things with swords, skewers and lightning conductors.
Polyurethane roof membranes based on Desmodur have proved ideal on flat roofs with fittings such as pipes, lightning conductors and air conditioning equipment.
They even took the church's lightning conductors - and today vicar Rev David Vestergaard was calling on local residents to help protect the much-loved building following the thefts which amount to more than pounds 10,000 .
The thieves have taken bells, statues, copper lightning conductors and lead from roofs.