Adjective lineal has 2 senses
  1. lineal, direct - in a straight unbroken line of descent from parent to child; "lineal ancestors"; "lineal heirs"; "a direct descendant of the king"; "direct heredity"
    Antonyms: collateral, indirect
  2. lineal - arranged in a line
    Antonyms:
    planar, two-dimensional (indirect, via cubic, linear)
    Antonyms: cubic, three-dimensional (indirect, via linear, planar)
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