drop

(redirected from drop back)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Idioms.

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 periodicals archive ?
He has failed to build on that in three outings since, registering figures of 564, but he has raced freely on his last two outings over 7f and might be suited by this drop back to 6f.
He added: "He will drop back in distance next time and we have a few races to consider - the Tingle Creek, John Durkan Memorial and the Paddy Power Dial-A-Bet.
The left back must drop back and sprint to the wall to block the first threat that shows.
Following this relatively large financing, Hovnanian's line usage should drop back significantly to the 20% to 25% range.
The drop back to 1m1f is unlikely to pose a problem and while he will need to improve, there is every chance he can find the required progression on only his eighth career start.
Yet it isn't easy to drop back and complete a long pass when the defense is in your face so quickly.
35 Hereford SP forecast 10-11 Doubtful he's very high in the pecking order at Seven Barrows, but yet to run a bad race and coped well with the drop back in trip to score at Huntingdon this month, having finished runner-up over 2m3f at Newbury on his hurdles debut.
Their linebackers are so quick, one second they are at the line of scrimmage and the next second, boom, they drop back into coverage and you have to deal with them there.
He races off the same mark today, has enough pace to cope with the drop back to 7f and was a winner here six weeks ago, so there's no reason why he won't run his race.
But Baffert offered an excuse: Flores let General Challenge drop back to fourth on the backstretch, seven lengths off the pace set by Hollycombe and Old Trieste, leaving too much ground to make up on the Santa Anita oval.
Ian Williams, trainer of Prince Apollo and Stevie Gee "Prince Apollo pulled very hard over a mile and a quarter on very soft ground at Haydock, suggesting a drop back in trip may be suitable.