Word: etched
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...ZoBell also found that certain bacteria etch little holes in limestone, allowing petroleum to percolate through. Others give off gases, forcing oil out of dead-end pores. Others pry oil films off mineral surfaces. All these quiet, persistent activities probably help the oil to collect in large underground pools...
...lowered our seats and pulled down the hatches. Now our vision was limited by the slits of our periscopes. The noise of battle was fainter in our ears, but it was still perfectly audible. Sweat began to etch rivulets down dusty faces and clot in the stubble of three-day beards. With brows pressed against the rubber cushion above the periscope we watched the battle panorama unroll. The smell of cordite and the smell of dead bodies filtered through the vents and seemed to enter our pores...
...contributing causes of tooth decay are not clearly understood, Hill admits. But it is certain that decay is usually associated with the presence in the mouth of swarms of bacteria, whose acid excretions etch away calcium from the teeth. These bacteria cannot live in human saliva unless sugar is present; and since sugar does not occur in normal saliva, they must get their nourishment from food taken into the mouth. Says Dr. Hill: "When diets are followed which contain a rigid restriction of sugar, these acid-forming organisms rapidly disappear from the saliva...
...Beards, America In Midpassage, p. 137, satirically etch from Democratic campaign fodder-"Mr. Garner, in the revered American tradition, was born in a log cabin." Does TIME, Beards, or Democratic Campaign Book...
Over Manhattan and Brooklyn one night last week a strange new beam of light appeared in place of an old one which had vanished. The new one: an advertising searchlight designed by one Alfred Gauthier, to etch letters and legends in the sky even when there are no clouds to provide a background. The old one: the revolving beacon atop Hotel St. George in Brooklyn, erected three years ago by Sperry Gyroscope Co. to guide aviators and to advertise the hotel. Recently the Department of Commerce ruled that only beacons actually on an established airway might use white lights...