ARCH

(redirected from neural arch)
Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.
Related to neural arch: Mammillary process, Pars interarticularis, intervertebral foramen, supraspinous ligament

ARCH

Autoregressive Conditional Heteroskedasticity

A statistical measure of the average error between a best fit line and actual data that uses past data to predict future performance. General Autoaggressive Conditional Heteroskedasticity is the most common way of doing this. See also: Fractal Distribution.
References in periodicals archive ?
The number of bands per neural arch increased with total length of the shark, suggesting their potential for age determination.
1) exhibit the following characters typical of these genera: general shape long and constricted medially; well developed epizygapophyseal spines; thin, long neural spine; thin, relatively uniform in width hemal keel; strong posterior neural spine overhang; and high, domed neural arch.
The one vertebra (12525) is badly damaged, but it is clearly like Ambystoma tigrinum based on its relatively large size and upswept neural arch (Holman, 1969).