Webster’s Revised Unabridged Dictionary · 1913
Stuttering
Stut′ter·ing, n. The act of one who stutters; — restricted by some physiologists to defective speech due to inability to form the proper sounds, the breathing being normal, as distinguished from stammering.
Stut′ter·ing, a. Apt to stutter; hesitating; stammering. — Stut′ter·ing·ly, adv.