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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 only one way out and that is to buy blueing powder and then apply it at the rate of 3oz (85gm) to 3 gallons (13.
Blueing: Textile material which have not responded satisfactorily to bleaching and have a slight off white appearance, can be improved further by blueing them.
With walnut stocks bearing weather resistant oil finishes to go with matt, non-glare blueing and 30-inch barrels, these are classic duck guns from the get.
Dynamic Finishes, the company that markets DBC, also offers a clear, easily applied ceramic exterior coating called Dyna Gun Shield that also provides some surface cooling, but doesn't change the color of traditional blueing or any other finish, and also makes the surface slicker and more corrosion resistant.
The quality of the walnut on the Mossberg 464 is something hunters and shooters have not seen in the last 50 years, and the deep, rich blueing heralds the look of a bygone era.
I normally use Brownells Oxpho-Blue to do touch-up blueing and have had great results, however, I have a current project gun that I am working on that has a little brass brazing work done on it.
In one typical check for uniform clamp pressure at the parting line, blueing agent applied to one mold half will transfer to the other if there is contact at the parting line, but it will not distinguish between low or high touch force.
We can't physically expand any more on our current site because we ore limited by the environs of the village so we ore leaking at building storage and blueing rooms further out so we can increase production.
It is matured in humidity-controlled cellars which allows the blueing to take place without hurrying the maturing process.
For blue flowers add alumina or another blueing agent and plant into an ericaceous compost.
Looking at the two of us in the mirror that morning, I wondered what she would look like with today's hair colorings (weekly applications of laundry blueing - a dark-blue liquid additive designed to make white clothes sparkling white - in the rinse kept her hair white), today's dentistry (she had a fine set of store teeth, but wore them only for special occasions), today's fashionable plus-size clothing (her cotton house dresses were exchanged for navy blue or lavender ``going to town'' dresses, with Grandma corseted so tightly you could bounce a quarter off her derriere, only for weddings, funerals and shopping).
45 ACP, BARREL LENGTH: 5", WEIGHT: 40 ounces w/ empty mag, FINISH: Semipolished bright blueing, SIGHTS: 3 dot, GRIPS: Pachmayr American Legend, PRICE: $4,950