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see DruzeDruze
or Druse
, religious community of Syria, Lebanon, Israel, and Jordan, with important overseas branches in the Americas and Australia. The religious leadership prefers the name Muwahhidun (Unitarians).
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(1) A form of natural crystalline mineral aggregate. It is an accumulation of free crystals that have grown from one end (crystal face or edge) on the walls of cracks or closed cavities in rocks. The free part of the crystals is well defined, with the main direction of growth close to the perpendicular of the growth surface. Druses of quartz, amethyst, calcite, and stibnite often occur.

(2) In plants, an inclusion of calcium oxalate crystals that form in the cells of many plants during their life processes (for example, in the stems of the linden and in the stalks of begonia and dock leaves).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


A small cavity in a rock or vein encrusted with aggregates of crystals of the same minerals which commonly constitute the enclosing rock.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Caption: In dry AMD, deposits called drusen form on the macula and cause it to break down over time.
The presence of drusen is a diagnostic criterion for early AMD and also gives information about disease progression.
It has been hypothesized that deposition of complement pathway complexes on and around the choriocapillaris could be related to the choriocapillaris loss observed since early AMD, correlating with the abundance and size of drusen [14].
In drusen, A[beta] is localized in vesicular components known as "amyloid vesicles" or "amyloid assemblies" [43, 78] and exhibits several shapes, diameters, and fusion processes.
Galloway et al., "Drusen in patient-derived hiPSC-RPE models of macular dystrophies," Proceedings of the National Academy of Sciences, 2017; 201710430 DOI: 10.1073/pnas.1710430114
The study also showed that patients who took the beta-carotene version of the AREDS formula and who were former smokers had an increased risk of developing lung cancer.[sup][8] The AREDS2 is underway to determine the effect of other vitamin supplements, such as lutein, zeaxanthin, and omega-3 polyunsaturated fatty acids [Table 1], to see whether this combination can further slow the progression of vision loss from dry AMD.[sup][8] A number of proposed in the Complications of AMD Prevention Trial, did not demonstrate clinically significant reduction of vision loss in patients with large drusen.[sup][9] The goal of treating dry AMD is to target the underlying cause of the disease and prevent.
The inflammatory proteins play contributory role in the progression of the disease that results into increased number of drusen, GA and CNV, all leading to complete loss of central vision.19,20
No drusen, orange pigment, or subretinal fluid was present (Figure 3).
Drusen are extracellular deposits of debris that accumulate between RPE and Bruch's membrane.
ARMD highly correlates with aging and is primarily caused due to the formation of cellular debris, also known as drusen, within retinal and choroidal pathology.
Dry form of AMD affects approximately 80-90% of individuals with AMD [3] and in this type of macular degeneration, extracellular small white or yellowish deposits (made up of lipids, a type of fatty protein), called drusen, accumulated between the Retinal Pigment Epithelium (RPE) and the inner collagenous layer of Bruch's membrane (vitreous lamina).
Current high resolution optical coherence tomography devices provide ample new information on retinal layers, drusen characteristics and their interaction.