The quality or state of being dioecious; the characteristic condition of having male and female organs on separate plants.
From 'dioecious' with the English noun suffix '-ness' added, creating an abstract noun describing the quality or property of exhibiting dioecy.
The dioeciousness of certain tree species became ecologically important when urban planners realized that planting only males to avoid messy fruits eliminated female-dependent wildlife that depends on seeds and fruits for food and dispersal.
Complete word intelligence in one call. Free tier — 50 lookups/day.