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an appliance for polarizing light.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


The first element of a polariscope that polarizes the light, as distinguished from the analyzer, the second polarizing element.
Farlex Partner Medical Dictionary © Farlex 2012


1. An optical element or a device that produces polarized light from incident unpolarized light. Examples: Nicol prism, Polaroid sheet, tourmaline crystal. To see that light is polarized, another device called an analyzer is necessary. 2. In a polariscope, the first of the two polarizing elements, the second being the analyzer. See polarized light; polariscope; Nicol prism.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

Patient discussion about polarizer

Q. Can bi-polar be treated with acupuncture and Chinese medicine? Any help would be appreciated. I am a bipolar. I always get side effects from the meds being prescribed by my psychiatrist. I feel better one day but the very next day I feel moody and have outbursts even on meds as if I am not after them. I wish to follow a different system of treatment. Can bi-polar be treated with acupuncture and Chinese medicine? Any help would be appreciated.

A. Do a lot of research before coming off your meds. You should consult your doctor about how to come off your meds safely. First arm yourself with information about what the effective treatments are and how to get those treatments.

Q. My brother-in-law named Jacob has bi-polar schizophrenia; please help us by giving some solution for this… My brother-in-law named Jacob has bi-polar schizophrenia; he is currently on his medication and takes them faithfully in a positive mood. We have a hard time communicating with each other and it's destroying our marriage, please help us by giving some solution for this…

Q. Is spending money irresponsibely a sign of impending manic attack? My 32 years-old husband is known to have bi-polar disorder, but for the last ten years he has been on lithium treatment and had no attacks. Last week he bought some very expensive things to our home, without asking me (we usually discuss these things before we do anything). Does this mean he’s getting a new manic attack? Other than that purchase everything else is normal, and he appears and behaves as usual. I don’t want to take him for the psychiatrist just for spending some money.

A. Spending money is not a unique character of bi-polar people... Maybe it was a bit less calculated action. If he has manic attack, usually there'll be more things that would tell you about it.

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References in periodicals archive ?
These specimens, which lay on long tables and on the concrete floor of a large room, were shot through with blue tourmaline crystals, many of which were doubly terminated.
Beautiful colored tourmaline crystals, to 20 cm long and terminated, lay before us: matchless things, world-class specimens!
After about 10 more minutes of digging in the pocket clay Ed hit a really big tourmaline crystal, 4 inches at least.
* 'From Black Crystals to TurmalinArt' presents a series of examples that reveal the inner beauty of black tourmaline crystals when thin sections of them are prepared perpendicular (and in some cases, parallel) to the c-axis.
Some tourmaline crystals, when you study them closely, actually have two or more tourmaline-group minerals residing in the same crystal.
Elijah Hamlin and Ezekiel Holmes found the first tourmaline crystals there in 1821.
The best known prospect in the Chihuahua Valley district is the Blue Lady mine, which has yielded numerous dark, indigo-blue tourmaline crystals, along with the occasional aquamarine and morganite specimen.
The Jonas mine yielded the single greatest pocket of tourmaline crystals in history--a one-time find in 1978.
I was offered many outstretched palms with crystals, predominantly spinel, and a few rubies, nearly all from An Phu, and just a few small tourmaline crystals from the Minh Tien pegmatite.
It proved to contain attractive, pastel-red tourmaline crystals with lepidolite and amazonite microcline.
His first ad in The Oregon Mineralogist in December 1933 offered a stock of several thousand terminated California tourmaline crystals. In 1933 he also offered his first mail mineral auction of "choice crystallized minerals" and gem material; the auction was apparently not successful and was not repeated.
Minor white fluorite, blue tourmaline crystals to 1 mm, schorl and hyaline opal complete the mineral assemblage from this unique dolomite-bearing miarolitic cavity.