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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 ?
It chronicles Ward's career and relationship with his half-brother and trainer Dicky Ecklund (Batman star Christian Bale), a former boxer fallen on hard times on the gritty, bluecollar streets of Lowell, Massachussetts.
The Philosopher Kings, a documentary about the wisdom of bluecollar workers, manages to be both amusing and moving, and never patronizes its subjects.
Head- hunters like Adecco, TeamLease and LabourNet are now providing semi- skilled and skilled bluecollar employees, such as bricklayers, welders, electricians and carpenters to construction companies.
Seven of the nine type 2 students were able to identify their occupational expectations: 1 listed a routine occupation, 1 bluecollar, 2 white-collar, and 3 identified professional occupations.
A boom in sectors like information technology, business process outsourcing (BPO), telecom, financial services, construction, entertainment and infrastructure, and the consequent explosion of jobs and salaries in the private sector gave the white- and bluecollar Indians an income to afford a plethora of products and services.
25pm) Shia LaBeouf, left, stars this fact-based drama about a bluecollar golfer who overcomes class prejudice for the chance to face his idol in the 1913 US Open.
The powerful tale of modern day vigilantism is reportedly Eastwood's final appearance in front of a camera and the film examines the clashes of ideals in predominantly white, bluecollar American neighbourhoods, where the ethnic and cultural make-up is altered by the influx of immigrants.
Adapted by Richard Price from his novel, the story shares the same bluecollar setting as his earlier Clockers.
Bluecollar jobs, homes, and families all began to leave San Francisco, replaced by whitecollar office jobs in the newly built downtown skyscrapers.
When Buchanan ran again in 1996, he called for "a conservatism of the heart" whose appeal was more populist than conservative and tailored to the Palin demographic: higher wages for bluecollar jobs, an end to unfair trade, fighting the rising tide of globalism, and stemming the economic and cultural decline of the two-parent family.
Bluecollar workers, traditionally in blue work shirts, tend to be hourly wage earners in factories or performing some type of manual labor.
I'm a white, senior woman from a bluecollar Midwestern family.