The quality or state of being leafy or having abundant foliage; the degree to which something has leaves.
From Latin 'foliosus' plus '-ity' (a quality or condition), creating a noun for the abstract concept of leafiness.
Climate change is affecting the foliosity of plants—some trees are producing fewer leaves in response to drought stress, which is one of the early warning signs scientists watch to track ecosystem health.
Complete word intelligence in one call. Free tier — 50 lookups/day.