(redirected from red dye)
Also found in: Dictionary, Thesaurus, Financial, Encyclopedia.


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
This content is provided by iMedix and is subject to iMedix Terms. The Questions and Answers are not endorsed or recommended and are made available by patients, not doctors.
References in periodicals archive ?
Several items covered in red dye were recovered from his home and when interviewed Heath admitted the offence.
A Warwickshire Police spokeswoman said: "The red dye contained within the cash box is designed to be difficult to remove and the offenders are likely to have had their clothing and exposed skin strongly coloured."
It also contains a red dye which may stain some fabrics, particularly cotton."
The dyes, phloxine B and uranine-- approved by the Food and Drug Administration as red dye #28 and yellow dye #8--are proving effective against Mediterranean and Mexican fruit flies, says David A.
Mark Keogh, 23, and 24-year-old Kieran Counihan fled with the Securicor box but it exploded emitting a red dye.
Its dashboard was stained with red dye which had come from the boxes when the robbers forced them open.
Police say the men and the money could be covered with red dye from the box's security device.
Sudan I is a red dye used for colouring solvents, oils and petrol.
Ponceau 4R, a red dye, is banned in the US and Norway over risks to asthmatics.
The spontaneous emergence of stable chemical patterns in the Bordeaux experiments is akin to that drop of red dye breaking into tiny droplets that align themselves into neat stationary rows and columns.