Definitions:

1. The property possessed by a line or surface that is curved and not angular. NOUN
   • The cylindricalness of the object made it easily fit into the tube.
2. The quality or state of being cylindrical. NOUN
   • The cylindricalness of the pipe facilitated the flow of water through the system.
3. The roundness of a 3-dimmensional cylinder. NOUN
   • The cylindricalness of the container allowed for convenient storage of the liquid.

Synonyms:

• circularity
• cylinder shape
• cylindricality
• roundness
• tubularity