drop

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Related to dropped: dropped bladder, dropped off, dropped the ball

drop

1. a steep or sheer incline or slope
2. Military the act of unloading troops, equipment, or supplies by parachute
3. Theatre See drop curtain
4. Nautical the midships height of a sail bent to a fixed yard
5. Austral Cricket slang a fall of the wicket
6. See drop shot
7. Rugby short for drop kick, drop-kick See also drop off dropout

Drop

Any one of the guttae attached to the underside of the mutules or triglyphs of a Doric entablature.

Drop

 

a small volume of liquid that is bounded in a state of equilibrium by a surface of rotation.

Drops form when a liquid flows slowly out of a small opening or runs off the edge of a surface, as well as when a liquid is atomized or emulsified. Drops also form when vapors condense on solid nonwettable surfaces and on condensation nuclei (ions, dust particles) in gaseous media; water droplets in the atmosphere arise in this way in the formation of dew, fog, and clouds.

The form of a drop is determined by the effect of surface tension (tending to decrease the surface of the drop) and external forces (above all, gravity). Microscopic drops for which gravity is not a decisive factor, and drops under the conditions of weightlessness have the form of a sphere, which is a body with minimum surface for a given volume. Large drops under earth conditions take a spherical form only when the densities of the drop and of the surrounding medium are equal. Falling raindrops, affected by gravity, the pressure of the opposing air current, and surface tension, assume the shape of a bun (broader across than vertically). Drops assume the shape of a flattened sphere on nonwettable surfaces, and they spread out on wettable surfaces.

The form and size of drops breaking away from the end of a capillary tube (pipette) depend on the diameter of the tube, the surface tension o~, and the density of the liquid. This relationship forms the basis for the determination of the surface tension of liquids from the weight of the drops leaving a vertical cylindrical tube (stalagmometer) and from the shape of the drops suspended from the end of a tube or resting on a flat surface.

IU. N. DROZHZHIN

drop

[dräp]
(fluid mechanics)
The quantity of liquid that coalesces into a single globule; sizes vary according to physical conditions and the properties of the fluid itself.
(hydrology)
The difference in water-surface elevations that is measured up-and downstream from a narrowing in the stream.
(metallurgy)
A casting defect due to the falling of a portion of sand from an overhanging section of the mold.
(mineralogy)
A funnel-shaped downward intrusion of sedimentary rock into the roof of a coal seam.
(plant pathology)
A fungus disease of various vegetables caused by Sclerotinia sclerotiorum and characterized by wilt and stem rot.

drop

1. Any one of the guttae under the mutules or triglyphs of a Doric entablature.
2. In a cabinet lock, the vertical dimension from the finished edge of the lock to the center of the cylinder or tube.
3. In air conditioning, the vertical distance that a horizontally projected airstream falls from its original elevation when leaving an outlet, measured at the end of the throw.
4. Same as drop curtain.
5. Same as drop panel.
6. Of a stair, a fitting used to close the bottom end of a tubular newel.
7. Same as pendant, 2; also see corner drop.
8. Same as turned drop.
References in classic literature ?
Our new money was not only handsomely circulating, but its language was already glibly in use; that is to say, people had dropped the names of the former moneys, and spoke of things as being worth so many dollars or cents or mills or milrays now.
So he flew down and got that acorn, and fetched it up and dropped it in, and was just tilting his head back, with the heavenliest smile on his face, when all of a sudden he was paralyzed into a listening attitude and that smile faded gradually out of his countenance like breath off'n a razor, and the queerest look of surprise took its place.
I dropped pap's whetstone there too, so as to look like it had been done by accident.
Soot had perched on a low branch and drawn up one leg and dropped the gray film drowsily over his eyes.
But when Old Orlick come for to hear that your uncle Provis had mostlike wore the leg-iron wot Old Orlick had picked up, filed asunder, on these meshes ever so many year ago, and wot he kep by him till he dropped your sister with it, like a bullock, as he means to drop you - hey?
The rest of the arms and powder we dropped overboard in two fathoms and a half of water, so that we could see the bright steel shining far below us in the sun, on the clean, sandy bottom.
At last came the day that the steamer dropped anchor in the lee of a wooded promontory where a score or more of sheet- iron shacks making an unsightly blot upon the fair face of nature proclaimed the fact that civilization had set its heel.
Monte Cristo approached, and dropped on his purple lips three or four drops of the contents of the phial.
Welland agreed, as if allowing for an inherited oddity; and after that the question of Newland's unemployment was tacitly dropped.
One man dropped with a bullet in his brain; a sword flew clattering across the deck and dropped over the edge beyond as I disarmed one of my opponents and the third went down with my blade buried to the hilt in his breast and three feet of it protruding from his back, and falling wrenched the sword from my grasp.
Then, having eaten, too, I lay down with my back to that of my faithful hound, and dropped into a deep and dreamless sleep.
Lower and lower sank her gunwale as we dropped aboard her, with no more care than the Gadarene swine whose fate we courted.