overshoot

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o·ver·shoot

(ō'vĕr-shūt),
1. Generally, any initial change, in response to a sudden step change in some factor, that is greater than the steady-state response to the new level of that factor; common in systems in which inertia or a time lag in negative feedback outweighs any damping that may be present. Changes in a negative direction are sometimes distinguished by the term undershoot, and the two may alternate in an oscillatory fashion, as in the transient oscillations of a pendulum when released from an initial displacement.
2. Momentary reversal of the membrane potential of a cell (inside becoming positive rather than negative relative to the outside) during an action potential; considered a form of overshoot1 because, before discovery of overshoot2, excitation was thought merely to depolarize the membrane to zero transmembrane potential.

overshoot

[ō′vərsho̅o̅t′]
1 v, to go beyond or exceed a target or goal.
2 n, an upper part of a structure that extends beyond the lower part.

o·ver·shoot

(ō'vĕr-shūt)
1. Any response to a step change in some factor that is greater than the steady-state response to the new level of that factor; common in systems in which inertia or a time lag in negative feedback outweighs any damping that may be present.
2. Momentary reversal of the membrane potential of a cell (inside becoming positive rather than negative relative to the outside) during an action potential.

overshoot

the stage of an ACTION POTENTIAL in which the voltage rises from zero to the positive peak.
References in periodicals archive ?
On August 22, 2005, at about 1030 Eastern time, a Piper PA-32R-301 Saratoga was destroyed during impact with trees and terrain, and subsequent postcrash fire, following an aborted landing at the Brandywine Airport (N99), West Chester, Penn.
At approximately 1624 Central time the airplane was destroyed following a loss of control during an aborted landing.
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A spokesman from EASYJET said: "The pilot carried out two routine aborted landings.
two aborted landings and then diverted, scary stuff.
HUDDERSFIELD Town's directors endured two aborted landings due to fog during a nerve-jangling flight for the club's match at Southampton.
There were many aborted landings, before finding, in the nick of time, a mossy cavity beneath rearing firs.
Travellers told the news agency how they were left "terrified" and fearing for their safety as planes, hit by powerful winds, aborted landings at the last minute.
HUNDREDS of passengers suffered the terror of two aborted landings because the pilot feared runway problems would mean he wouldn't be able to land safely.