Decaaut
Main Article: Actions
One decaAut (deca-aut, sometimes referred as a turn) is equal to 10 aut, or 10 arbitrary units of time. It is the time it takes for an untransformed, unstatused atheist human wearing no items to move 1 tile of dungeon floor. Additionally, pressing s or . lets you wait for one turn. It is also just the 'standard' time for an action, and thus useful as a general measurement (such as turns until the Zot clock runs out).
Most species will also naturally take 1 decaAut to move, and the time it takes for all species in their natural form and condition to do many actions (like reading scrolls, quaffing potions, or casting spells). A primary exception is attack speed, which is often measured by delay; weapons can take from 0.7 to 3 decaAut to swing, before modifiers like shields and skill.