1. the quality or state of being deciduous; the characteristic of shedding leaves, antlers, or other parts seasonally or at a particular stage of growth
Usage: commonly used in botany and zoology; often contrasted with evergreen or persistent characteristics

Examples

• The deciduousness of oak trees makes them lose their leaves in autumn.
• Biologists study the deciduousness of various animal species to understand seasonal adaptation.
• The deciduousness of the forest creates a dramatic change in landscape each fall.
• Many temperate trees exhibit deciduousness as an adaptation to cold winters.
• The deciduousness of deer antlers is a natural part of their annual cycle.