is the unit of absolute, or dynamic, viscosity proposed for SI, equal to 1 pascal-second.  As a matter of policy, the CGPM generally resists naming additional derived units, and the poiseuille has not been approved, the term pascal-second being preferred.  It has the dimensions ML^-1T^-1. The abbreviation for poiseuille is typically symbolized by Pl.

1 poiseuille = 10 poise.