non-coherent

adjective

1. logically connected; consistent: a coherent argument.
2. having a natural or due agreement of parts; harmonious: a coherent design.
3. cohering; sticking together: a coherent mass of sticky candies.
4. Physics, Optics. of or relating to waves that maintain a fixed phase relationship, as in coherent light, or light in which the electromagnetic waves maintain a fixed and predictable phase relationship with each other over a period of time.See also laser.

adjective

1. capable of logical and consistent speech, thought, etc
2. logical; consistent and orderly
3. cohering or sticking together
4. physics (of two or more waves) having the same phase or a fixed phase differencecoherent light
5. (of a system of units) consisting only of units the quotient or product of any two of which yield the unit of the resultant quantity

adj.1550s, from Middle French cohérent (16c.), from Latin cohaerentem (nominative cohaerens), present participle of cohaerere “cohere,” from com- “together” (see co-) + haerere “to stick” (see hesitation).