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1. the color produced by the longest waves of the visible spectrum, approximately 630 to 750 nm.
2. a dye or stain with this color.
scarlet red an azo dye used as a biological stain for fats.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


One of the primary colors, produced by the longest waves of the visible spectrum, with violet at the other end. For individual red dyes, see specific name.
[A.S. reád]
Farlex Partner Medical Dictionary © Farlex 2012
Drug slang A regional term for, ‘under the influence of drugs, stoned’
Fringe medicine A colour believed—by the proponents of the pseudoscience of colour therapy—to increase circulation and energy, and reduce anxiety
Physics A primary colour produced by the longest waves of the visible electromagnetic spectrum from 630 to 740 nm
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


One of the hues of the visible spectrum evoked by stimulation of the retina by wavelengths beyond 630 nm. The complementary colours to red are blue-green (between 490.4 and 492.4 nm).
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

Patient discussion about red

Q. is red meat bad for you??? and what about white meat like pork??? why is consider to be healthy eating vegie what are the advantages of this kind of nutrition ? what are the actual differences in a nutrition matter ?

A. Eating red meat an average of about twice a day seems to raise the risk of stomach cancer. This risk is increased even more if the meat is barbecued and well done. there are more evidence about colon cancer , and also higher risk of strokes. but i have no idea about white meat. although barbecued meat (white or red) had a material that our liver cause it to be cancerous.

Q. Does anybody know what can be done about a very itchy red rash on ones' toes which comes back every few months I've used different sorts of creams such as Lamasil. It's really bothering me and I'd love to get a few directions before I give up and go see a doctor.

A. Sounds like 'Athletes foot'. Here is a website that lists some remedies for it:'s_Foot.cfm

Q. I have red blotches under my skin and swelling on hands and feet with joint pain. Any answers. it has been two days the blotches are gone but I still have swelling.

A. could be some kind of joint Rheumatic fever... some kind of joint infection. this should be looked upon by a Dr. those things can cause damage if not treated right. a bacterial infection that is not treated can cause a permanent damage.

More discussions about red
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References in periodicals archive ?
In sum, while the magnitude of the effect differed by species, results from analyses of golden mice and chipmunk color (at least for the agouti fur) were qualitatively similar; specimens from earlier years tend to be redder than those from more recent years.
The more anthocyanins a plant produces, the redder its leaves become.
The three types of pork-normal; pale, soft exudative; and dark, firm dry-all become redder after irradiation, especially the pale cuts.
Since the days are slightly longer and the light is redder on Mars than on Earth, astronauts' circadian rhythms could be altered, affecting their sleep, for instance.
Generally, the smaller the pepper, the hotter it is; the redder the pepper, the sweeter it is.
The redder the pulp of the grapefruit you eat, the more lycopene you get.
We did not have time to add power to try to go over it, so both of us gave a little boot of right redder to go around it.
The Congress has given him a green light to "make red war yet redder," as Thomas Hardy once put it.
The redder the watermelon, the more lycopene it contains.
But Sessions, turning redder and redder, would have none of it: "The nation will not prevail until there's progress on the battlefield!"
Comments: This is a unique, red shade copper phtalocyanine blue, epsilon crystal pigment which offers the opportunity to shade blues to a redder, cleaner hue with minimum risk of metamerism.
Recently I received a letter from a redder taking me to task over my comments about clean burning powder in the Nov/Dec issue.