A form of neurostimulation which uses a constant low current delivered to the brain area of interest via electrodes on the scalp, typically as a way of treating psychiatric conditions.

In a directional manner.

(uncountable) The condition of being directional. / (countable) A measure of the extent to which something is directional.

Lacking direction; aimless.

Absence of direction.

Without (fixed) direction; aimlessly.

(slang) A fan of the British-Irish pop group One Direction.

plural of Directioner

plural of directionality

Alternative spelling of bidirectionality