The quality of being able to be communicated or transmitted, especially of ideas or diseases.
From 'communicable' (Latin communicabilis) plus the abstract noun suffix -ity. The medical sense (disease communicability) became common in epidemiology.
During COVID-19, 'communicability' became a crucial concept—scientists measured the R-value (how many people one infected person communicates the disease to) because higher communicability means exponential spread.
Complete word intelligence in one call. Free tier — 50 lookups/day.