This recommended practice provides a definition, terminology, conceptual model, and standard metrics for ad hoc network communication at the nanoscale. The physical properties of nanoscale communication extend human-engineered networking in ways beyond that defined in existing communication standards including in vivo, sub-cellular medical communication, smart materials and sensing at the molecular level, and the ability to operate in environments that would be too harsh for macroscale communication mechanisms to operate. Nanoscale communication also requires collaboration among a highly-diverse set of disciplines with differing definitions and connotations ...