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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 ?
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.
My step-mother, of course, in-laws, out-laws, the over-extended family, thinning blood relations, a gaggle of barely surviving ill-wishers, frail & gaga friends, & a few relative surprises--Aunt Helen whose metabolism still functions though her brain is fudge, her fourth husband, Ned, a dead white male collector of postcards of depopulated federal parks, & my cousin-in-law's ex-wife Charlotte, a scarlet woman born to be slapped by a bluecollar man at a roadside bar.
Bluecollar workers in factories have, of course, long been on the front line in facing the ups and downs of business cycles, as well as the intensification of global pressures.
You may also discover that there are a large number of bluecollar workers who require employee physicals and drug screens from your pre-existing lab.
Nasreen [female, Lebanese origin, bluecollar father] commented:
For instance, individuals employed in bluecollar and service occupations are much more likely than white collar workers to work at sites that don't have no-smoking policies (Barbeau, Krieger, & Soobader, 2004; Bourne, Shopland, Anderson, & Burns, 2004), an inexpensive but effective policy to protect worker health and reduce employer health costs.
Career opportunity and organizational attachment in a bluecollar unionized environment.
Perhaps most telling in this respect is the fact that of the artist's two muses, one--Aleksandr Solzhenitsyn, the Nobel Prize-winning Soviet novelist whose dissident views led to imprisonment and then exile--is decidedly Romantic, a solitary victim who, year after year, levied his lonely voice against social oppression (and lived out years of hard-won individualism in the Vermont woods before returning to the Motherland), while the other--John Travolta, America's quintessential bluecollar sex symbol--is "merely" romantic.
Falwell, on the other hand, in Anchorage, and pitched more bluecollar, sounded either tipsy or jet-lagged as he laughingly told us how to manage our nagging wives.
Surviving unemployment: Economic resources and job loss duration in bluecollar households.