incoherent

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in·co·her·ent

(in'kō-hēr'ent),
Not coherent; disjointed; confused; denoting a lack of connectedness or organization of parts during verbal expression.
[L. in- neg. + co-haereo, pp. -haesus, to cling together, fr. haereo, to stick]
Farlex Partner Medical Dictionary © Farlex 2012

incoherent

(ĭn″kō-hē′rĕnt)
Not coherent or understandable.
Medical Dictionary, © 2009 Farlex and Partners

coherent sources 

If light beams from two independent sources reach the same point in space, there is no fixed relationship between the phases of the two light beams and they will not combine to form interference effects. Such light waves are called incoherent. If, on the other hand, the two light beams are superimposed after reaching the same point by different paths but are both radiated from one point of a source, interference effects will be seen because the phase difference in the two beams is constant. The two virtual sources from which these two beams are apparently coming are called coherent sources and any rays in which there is a constant phase difference are called coherent rays. Prior to the advent of the laser, the only way in which one could obtain coherent rays was by dividing the light coming from a point source into two parts. See Young's experiment; holography; clinical maxwellian view system; optical coherence tomography.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Al Nuaimi then started shouting at them and speaking incoherently. The teenager's condition worsened and he became unconscious.
His client could not remember the incident and numerous witnesses had spoken of him speaking incoherently and barely able to walk or talk.
The blind defendant, who once led a powerful group with about 40,000 members, often mumbled incoherently, sometimes interfering with court sessions with bizarre outcries.
* Talking incoherently and failing to respond to simple commands
As to keeping the little mosquito-eating devils outside where they belong so that your spouse does not call you at work screaming incoherently, use mothballs.
The fraction of UCN scattered incoherently into the material could possibly explain the observed "anomalous losses." In order to study this experimentally, one has to measure both parameters, the depolarization and the loss probability per wall collision, simultaneously in the same experiment;
So often the events of our lives seem like the thousand pieces of a puzzle lying incoherently and disconnectedly before us.
A 14-year-old male is brought to the emergency department by his father because after the teen arrived home he began mumbling incoherently and stumbling.
Traditional theology incoherently has God both willing death and promising from eternity to abolish death (86).
He had apparently begun muttering incoherently, wandering from seat to seat and stripping off his clothes, before breaking into the cockpit and threatening the pilots.