(statistics) Initialism of autoregressive conditional heteroskedasticity

A diminutive of the male given names Archibald or Archie.

plural of arch

Third-person singular simple present indicative form of arch

The state of being arch.

present participle of arch

The arched part of a structure.

(nautical) hogging, as opposed to sagging

(philosophy, often italicized) The first principle of existing things in pre-Socratic philosophy, initially assumed to be of water.

Arches National Park, a national park in Utah