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A color between green and indigo on the spectrum. For individual blue dyes, see the specific name.
Synonym(s): cerulean


1. a color between green and indigo, produced by energy with wavelengths between 420 and 490 nm.
2. a dye or stain with this color.

aniline blue  a mixture of the trisulfonates of triphenyl rosaniline and of diphenyl rosaniline.
brilliant cresyl blue  an oxazin dye, usually C15H16N3OCl, used in staining blood.
methylene blue  dark green crystals or crystalline powder with a bronzelike luster; used in the treatment of methemoglobinemia and of cyanide poisoning, and as a bacteriologic stain and an indicator.
Prussian blue  an amorphous blue powder, Fe4[Fe(CN)6]3, used as a stain.
toluidine blue , toluidine blue O the chloride salt or zinc chloride double salt of aminodimethylaminotoluphenazthionium chloride; useful as a stain for demonstrating basophilic and metachromatic substances.
Drug slang A regional term for a depressant; crack
Fringe medicine A colour claimed in the pseudoscience of colour therapy to be antibacterial, maintain circulation in optimum condition, soothe nerves, increase vitality, treat rheumatic complaints, and prevent cancer
Physics A colour corresponding to wavelengths 455-492 nm


Physicians Desk Reference A book published annually that lists all ± 2500 US therapeutics requiring a physician prescription
PDR 7 color-coded sections
White Manufacturers' index, containing the company addresses and list of products
Pink Product name index, an alphabetical listing of the drugs by brand name
Blue Product classification, where drugs are subdivided into therapeutic classes
Yellow Generic and chemical name index
Multicolored Photographs of the most commonly prescribed tablets and capsules
White Product information, a reprint of the manufacturers' product inserts and
Green Diagnostic product information, a list of manufacturers of diagnostic tests used in office practice and the hospital; Cf Over-the-counter drugs  . ;.


A range of hues in the visible spectrum lying between green and indigo.
[M.E. fr. Germanic]


adj in Chinese medicine, a facial coloration, often on the nasal bridge, that indicates unresolved emotional shocks. Useful in diagnosis of childhood illnesses.


Visual sensation evoked by radiations within the waveband 450-490 nm. It is a primary colour and the complementary of yellow. See complementary colour; primary colours.


1. a color between green and violet in the visible spectrum; the color of the clear sky.
2. a silver-gray coat color. A description often used in dogs and cats, and some breeds of cattle.

Patient discussion about blue

Q. I’m sick of feeling blue, and wish I could just enjoy life like other people do. Hi, I get in to depressive episode even for minor issues. Although my depression makes it hard for me to maintain friendships, I have a number of close friends. I’m going well with my parents. I have a stable, well-paid job and a first class master’s degree. I'm fit, healthy and don't consider myself unattractive. I don't understand why I get depressed, but I feel down most of the time. I sleep too little or not enough, and my diet deteriorates during the real low periods. I lack motivation in everything and it started to affect my job. I’m sick of feeling blue, and wish I could just enjoy life like other people do.

A. Make an appointment with your doctor as soon as you can and tell him/her all that you are saying here. Your doctor can help you with this and get you going again. Don't put it off or try to cure yourself with alternative stuff.

Q. Is a Proventil Inhaler cheaper by you than Secirity Blue? I pay $60. with Security Blue now. Is it cheaper with you for a three months supply ?

A. here is a drug prices comparing site-

but i couldn't find there that other drug you were talking that it's name?

More discussions about blue
References in periodicals archive ?
longer days and bluer skies Are reflected in my baby's eyes.
Heavy smog has been frequent in the Chinese capital since February, and skies in neighbors Tianjin and Hebei are hardly any bluer.
She defined this last category by asteroids' origins - whether in a warmer or colder environment - a characteristic that can be determined by whether an asteroid's surface is more reflective at redder or bluer wavelengths.
Scientists at the US Department of Energy s Argonne National Laboratory and the University of Texas at Austin developed a new, inexpensive material which has the potential to capture and convert solar energy from the bluer part of the spectrum more efficiently than ever before.
Imaging is also enhanced by Sony's new Triluminos display, which creates "an even wider palette of rich, ultra-real colours so that skies are bluer, seas look deeper and skin tones look even more true to life.
A Tie Me Kangaroo Down, Sport B Sun Arise C Bluer Than Blue D Two Little Boys QUESTION 2 - for 2 points: Which variety of beans is used to make baked beans?
31 days WAS from PS2759pp NOW from PS2069pp The Glorious Caribbean from London Tilbury on board Marco Polo Departs 3 November 2013 Escape November's gloom and chill and sail away on Marco Polo to the blue seas and even bluer skies of the sun-kissed West Indies.
The older redder stars traveled in random circular orbits while the bluer stars were the younger stars and these stars traveled in an elliptical pattern.
In the early '70s and '80s there was no-one bluer or filthier than I was.
The color of their feet ranges from pale turquoise to aquamarine and depends on access to food--so the bluer the better
I knew my dad was right, but I just kept feeling bluer than the bluest blueberry in Blue Land
Though other blue diamonds have less than one atom of boron per million, the extra boron doesn't make the Hope bluer.