affine

/əˈfaɪn/
adjective
  1. Related by marriage, not by blood.
    • Her affine relatives include her husband's cousins.
    • The wedding brought together both blood and affine family members.
    • In some cultures, affine relationships are as important as blood ties.
  2. In mathematics, describing a type of geometry or transformation that preserves points, straight lines, and parallelism.
    • An affine map can stretch or shrink a shape but keeps lines straight.
    • The students studied affine transformations in their geometry class.
    • Affine geometry is a branch of mathematics that deals with parallel lines.
Antonyms
What does "affine" mean? | whatsthatwordmean | whatsthatwordmean