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(roo'ga) plural.rugae [L.]
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RUGAE: Rugae of stomach as seen through an endoscope
A fold or crease, esp. one of the folds of mucous membrane on the internal surface of the stomach. See: illustration

palatal ruga

One of the folds of the mucous membrane of the roof of the mouth. Synonym: palatine ruga

palatine ruga

Palatal ruga.

ruga of vagina

One of the small ridges on the inner surface of the vagina extending laterally and upward from the columna rugarum (long ridges on the anterior and posterior walls).


Folds, wrinkles or creases, as in the skin of the scrotum.
References in periodicals archive ?
Reproductive hormone deficiency leads to vulvar and vaginal thinning, loss of rugal folds, diminished elasticity, diminished vaginal glycogen, and decreased acidity (increased pH) of the vaginal secretions, thereby reducing the vagina's natural defenses.
Gastric emptying time was defined as the absence of contrast material within the proventriculus and ventriculus on both fluoroscopic views or the presence of sufficient barium to highlight the rugal folds only.
Insufflation of air was continued till the rugal folds begin to separate and foreign body was identified (Fig.1).
Often a reduction or absence of rugal folds and small mucosal elevations due to the presence of islands of intestinal metaplasia are seen.
Grossly, the mucosal surface of the antrum showed tan rugal folds with multiple areas of submucosal hemorrhage ranging in size from 0.3 to 0.7 cm in diameter.
With estrogen deficiency, as the epithelium of the vagina and vulva thins and loses its rugal folds, elasticity diminishes, and susceptible to injury, even with minor trauma, ensues (FIGURE 1).