monotonic

adjective3

1. •
   Uttered in a monotone; monotonous.

   • The Same Spade talk-alike, super-cynical heroine of the piece is named Emma Victor, and there's no end to her rapid-fire, monotonic, street-smart patter. — 1988
2. •
   Of a function: that either never decreases or never increases as its independent variable increases.
3. •
   Of or using the Greek system of diacritics which discards the breathings and employs a single accent to indicate stress. It replaced polytonic system in 1982.