\Mon`o*ton"ic\, Monotonical \Mon`o*ton"ic*al\, a. Of, pertaining to, or uttered in, a monotone; monotonous. ``Monotonical declamation.'' --Chesterfield.
In domain theory, a function f : D -> C is monotonic (or monotone) if
for all x,y in D, x <= y => f(x) <= f(y).
("<=" is written in LaTeX as \sqsubseteq).