|1.||of, being, relating to, or in the direction of a tangent|
|2.||astronomy Compare radial Also: transverse (of velocity) in a direction perpendicular to the line of sight of a celestial object|
|3.||of superficial relevance only; digressive|
tangentiality tan·gen·ti·al·i·ty (tān-jěn'shē-āl'ĭ-tē)
A disturbance in the associative thought process in which one tends to digress readily from one topic under discussion to other topics that arise through association.