ridge

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ridge

1. a long narrow raised land formation with sloping sides esp one formed by the meeting of two faces of a mountain or of a mountain buttress or spur
2. Anatomy any elongated raised margin or border on a bone, tooth, tissue membrane, etc.
3. 
a. the top of a roof at the junction of two sloping sides
b. (as modifier): a ridge tile
4. the back or backbone of an animal, esp a whale
5. Meteorol an elongated area of high pressure, esp an extension of an anticyclone
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

ridge

(scarp) See lobate ridge; wrinkle ridges.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Ridge

The horizontal lines at the junction of the upper edges of two sloping roof structures.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

ridge

[rij]
(architecture)
The line on which the sides of a sloping roof meet.
(geology)
An elongate, narrow, steep-sided elevation of the earth's surface or the ocean floor.
(meteorology)
An elongated area of relatively high atmospheric pressure, almost always associated with, and most clearly identified as, an area of maximum anticyclonic curvature of wind flow. Also known as wedge.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

ridge

1. The horizontal line at the junction of the upper edges of two sloping roof surfaces.
2. The internal angle or nook of a vault.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ridge

 

a linearly extended upland, often with soft, rounded parts. Ridges are usually the remnants of mountain ranges that have been greatly eroded and then slightly uplifted (for example, the Timan Ridge and the Donets Ridge).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Caption: Figure 2: Photomicrograph of the VX that demonstrates hyperparakeratosis with keratin plugs, elongated, thickened epithelial rete ridges, and subepithelial connective tissue filled by foamy cells (arrows).
The distinctive histology of a verrucous carcinoma, namely, the endophytic growth and pushing epithelial rete ridges, was conspicuously missing.
A prominent capillary network and slight thinning of the overlying stratified squamous epithelium with absence of rete ridges are noted.
Haematoxylin and eosin stained sections of the tissue exhibited thick keratotic stratified squamous epithelium with acanthosis, elongated broad rete ridges, collection of neutrophils and RBC's within keratin layer and superficial spinous cells.
Skin biopsy revealed subepidermal separation accompanied by thinning of the epidermis with loss of rete ridges and the presence of dermal edema.
Acanthosis, papillomatosis, hyperkeratosis of the epidermis, and elongation of the rete ridges were evident, lathe dermis, thick bands of collagen were also noted.
Out of 77 cases of classic LP all patients (100%) had hyperkeratosis (Figure 6) and hypergranulosis in 74 (96%) whereas acanthosis was seen in 71 (92%) cases, elongated rete ridges in 52 (67%) cases, basal cell degeneration in all the cases (90%), band-like inflammatory infiltrate (Figure 7) in 73 (95%) cases, melanin incontinence seen in 76 (98.7%), Civatte bodies seen in 72 (93%) and Max-Joseph spaces in 23 (29.8%) cases.
Acanthosis with irregular elongation of the rete ridges was in the involved epidermis [Figure 1]b.
Moreover, there were elfacement of the rete ridges and sparse perivascular lymphocytic infiltration around superficial dilated vessels (Fig.
Figure 3: 10x view showing lichen nitidus--claw shaped elongation of epidermal rete ridges encircling well defined inflammatory infiltrate--claw clutching the ball appearance.
The classic epidermal hyperplasia of a lentigo simplex, with thin, elongated rete ridges, may be absent.
Histopathology showed hyperkeratosis, parakeratosis, elongation of rete ridges and mild perivascular mononuclear infiltrate.