Source : Webster's Revised Unabridged Dictionary (1913)

Mixtilineal \Mix`ti*lin"e*al\, Mixtilinear \Mix`ti*lin"e*ar\, a.
   [L. mixtus mixed (p. p. of miscere to mix) + E. lineal,
   linear.]
   Containing, or consisting of, lines of different kinds, as
   straight, curved, and the like; as, a mixtilinear angle, that
   is, an angle contained by a straight line and a curve. [R.]