black stain

black stain

(blak stān)
Black or gray discoloration of teeth near the gingival margins; may be caused by chromogenic bacteria or by orally inhaling silver or manganese dust.
References in classic literature ?
Such being the case, and he, the old bachelor, in possession of the ill-gotten spoil,--with the black stain of blood sunken deep into it, and still to be scented by conscientious nostrils, --the question occurred, whether it were not imperative upon him, even at this late hour, to make restitution to Maule's posterity.
The moon had set, but the night was so transparent that the white house-fronts between the elms looked gray against the snow, clumps of bushes made black stains on it, and the basement windows of the church sent shafts of yellow light far across the endless undulations.
He said that the saner people of Jammu should realize that this brazen support of a murderer and rapist was putting a black stain on humanity.
Khojaly tragedy is a black stain in the human history that will never be forgotten, Ravza Kavakci, deputy chairman of Turkey's ruling Justice and Development Party (AKP), said in a statement Feb.
In one study, a group of 6-year-old Spanish children with black stain had consumed a significantly higher proportion of iron supplements than children without black stains (8).
Positive strains showed blue-black colonies with Sudan black stain and red fluorescence after staining with Nile Red A and exposure to UV (Fig.
The ASTM black stain media, red lipstick, and red wine were the most deleterious stains and should be considered as being very aggressive for stain repellency testing.
Pick up the hulls, and nature takes care of the black stain.
Zaman daily Editor-in-Chief AbdE-lhamit Bilici, who had hard time in speaking to to tear gas that covered inside the building, said the scene will be noted in the Turkish history as a black stain.
On the release of former minister Michel Samaha, the LF leader deemed the military court's decision as "a black stain on the forehead of the Lebanese judiciary.
The laws have "left a black stain on the history of Japan as a constitutional democracy," he said in a statement.
The tape should have a homogenous light black stain.