knobby

Etymology

From knob + -y.

adj

1. Resembling a knob.
   They appeared, upon section, like wedge-shaped, knobby formations, penetrating into the placenta fetalis, and were thus found in three places ; the smallest was 3 mm. and the largest was 15 mm. in diameter. 1871, New York Medical Journal - Volume 14, page 431
   The baby kicked energetically. She caressed a knobby knee or elbow. 2012, Carrie Weaver, Baby, I'M Yours
2. Having many knobs or knob-like projections.
   The large open leaves and large knobby leaves were picked out by hand, and formed the finest sort of "hyson skin" (known commercially as pretty good bloom, brightish hyson kind mixed, knobby leaf); the remaining leaves were hyson. 1860, The Encyclopaedia Britannica
   Knobby Creek rises in the center part of Union Township, flowing north where it empties into the Osage River. Name suggested by the "knobby" character of the surrounding country, i.e. full of "knobs" or low hills. Sometimes called Beaver Creek, from the animal found here in early days. 1943, Fauna R. Overlay, Place Names Of Five South Central Counties Of Missouri, M.A. thesis., University of Missouri-Columbia, archived from the original on 2016-06-24
   Further evidence for the correlation of basin structures arises from the spatial relation in both basins of the massifs to the associated knobby terrain. 1975, Lunar Science Institute, Proceedings of the Sixth Lunar Science Conference, Houston, Texas
   The oldest surface identified has a crater retention age N(l) 230,000 and is found below the knobby terrain (K). 1988, NASA Technical Memorandum - Issue 4041, page 456