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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 ?
Lavery saw red after a poor challenge on Scott Ferguson and Smith punished the 10 men.
WAR CASUALTY Sam Warburton saw red for this tackle on France's Vincent Clerc
Mick Turner then grabbed the winning goal before Lee Darlison also saw red.
Alper Potuk cancelled out Ahmed Hassan's opener for the hosts but after Mehmet Topal saw red, Josue netted a 69th-minute penalty and Nikola Stoiljkovic and Rafa Silva wrapped it up.
Raging Real Madrid star Cristiano Ronaldo lost the plot in Cordoba as he saw red for lashing out at an opponent - minutes after he escaped punishment for throwing a punch.
Philly Hughes (inset) and Simon Kelly both saw red in the Louth derby - as subs!
Skipper Warburton saw red in the 19th minute of the semi in Auckland for a spear tackle on France's Vincent Clerc and Wales missed out agonisingly 9-8.
Despite having midfielder Paul Spacey and striker Lee Greenway dismissed - Evesham's Neil O'Sullivan also saw red - the Greenbacks dug deep and deservedly took the spoils.
However, it has since transpired that Beattie was beaten to the early bath by Sandy Brown, who saw red against Leeds in 1964, after just four minutes.
A point in the Champions League Group E opener looked certain after Stilian Petrov and Henrik Larsson had cancelled out David Trezeguet's double and they were even dreaming of victory after Edgar Davids saw red.
Real Madrid star Gareth Bale struck home a late winner from the spot just minutes after team-mate Cristiano Ronaldo saw red for slapping an opponent.
The game became niggly and Ramsey, already booked for a clumsy foul, saw red in 80 minutes for pulling back Ozyakup.