tangential

/tænˈdʒɛnʃəl/
adjective
  1. Only slightly related to the main topic; not directly relevant.
    • The report included some tangential information that wasn't necessary.
    • She made a tangential point that didn't address the main issue.
    • His comment was only tangential to the discussion.
  2. Relating to or moving along a tangent; touching a curve or surface at a single point.
    • The tangential force caused the object to fly off the edge.
    • The car went into a tangential skid on the icy curve.
    • We measured the tangential velocity of the spinning wheel.