adj. Able to be treated; not incurable or intractable.
the GNU version of the Collaborative International Dictionary of English
adj. Manageable; tractable; hence, moderate; not violent.
The Century Dictionary and Cyclopedia
Tractable; well-disposed; affable.
Yielding; complaisant.
Disposed; inclined.
Moderate; not violent or excessive.
Word Usage
"His family said in a statement released to The Associated Press that the 85-year-old Paterno continues to undergo a "regimen of treatments" after being diagnosed two months ago with what they call a treatable form of lung cancer."