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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 ?
The Pale Blue Dots is a project of complete freedom, with Bunf and I exploring mutual interests in sounds that come to us freely as well as working together to create new songs and soundscapes that give listeners something to hold on to.
Pale Blue Dot project manager Ian Phillips said: "We are delighted to be working on such a visionary initiative - decarbonising our industrial emissions is every bit as important as reducing emissions from power generation, and has been a muchneglected area in the low-carbon debate.
Strong, bright blues stimulate, while pale blues soothe.
Those who are cool and calm by nature, who prefer understated elegance and have a natural gift for keeping things in proportion, are generally more likely to favour a garden palette of soft pinks, mauves, purples and pale blues.
SPLASH OUT: A Smeg Retro fridge freezer, pounds 1,349 from Marks & Spencer, in pale blue is a fabulous, funky purchase, and its China Blue crockery featuring blue blooms on a white background, starts from just pounds 5 for a mug.
It did so, in 1990, and Earth shows up in a grainy image as a pale blue dot.
They're available in pink, beige, pale blue, purple, chocolate, cream, mauve, red, black, peacock blue, navy, mint and lime green.
He was last seen wearing a blue checked short sleeve casual shirt, pale blue jeans, white trainers, a light blue lightweight jacket and carrying a black hold-all.
1], outlined distad with single row of pale blue scales; still narrower and pointed caudad macule in anterior half of [CuA.
Many buildings were lit in soft shades of purple or pale blue, and palm trees along the park were decorated in red and green like Christmas was coming.
The Pale Blue Eye By Louis Bayard The origins of "The Tell-Tale Heart"?
Bell's palette here ranged from pale blue to gray to green to amber, but isolated color is far from the artist's be-all and end-all.