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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 ?
There is also redness or blueness on the hands and feet, in addition to the appearance of stretch marks in the abdominal area, which results in itching.
from the future though the cybernetic bells snow a deaf blueness
On November 21, 2012, during the second Israeli offensive on Gaza, I wrote an opinion piece for Al Jazeera "Steal what you will from the blueness of the sea and the sand of memory".
2008, English and Montgomerie 2011), which increased blueness but also increased brightness across most of the spectrum compared to their natural eggs.
com)-- In design, there is no richer source of inspiration than nature - the rich colors of the flowers in the fields, the lush green forest, and the blueness of the skies.
Also, the sentence "The sky is immense, its blueness close to black" is typically Le Clezian.
The first thing you notice about Lulu Island is the blueness of the water.
He taught me humility and pride and resourcefulness, and above all the fact that a man is loved and respected because of the things he carries in his heart, and that after all is said and done the color of his skin, the breadth of his acres, nor the blueness of his blood are not particularly important.
When I said I'd felt good in the morning but at that moment my blueness had hit subterranean levels, she wondered if the shift in my mood was really - look away now if you're of a nervous disposition - caused by people whispering about me on the train, calling me names under their breath.
Of survival in devilish storm and tsunami Waking to rays of light, dust motes, warmth, And blueness barely a wisp of cloud.