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Related to pharyngeal arch: pharyngeal pouch, second pharyngeal arch

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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 ?
All members of the genus Nocomis have relatively stout pharyngeal dentition, but the pharyngeal arch and teeth of the bull chub are the most robust of all Nocomis species, especially in larger fish (Lachner and Jenkins, 1971), and are well-adapted for crushing mollusks (Jenkins and Burkhead, 1993).
Two lateral lingual swellings and one median swelling Tuberculum impar from 1st pharyngeal arch forms the anterior 2/3rd of the body of the tongue.
DISCUSSION: Choristoma in tonsil could be a developmental abnormality of second pharyngeal arch.