1. The plural of deciduousness; the quality or state of being deciduous, especially the characteristic of trees or plants that shed their leaves seasonally.
Usage: Plural form; rarely used in everyday speech; Technical or botanical context

Examples

• The deciduousnesses of oak and maple trees make them popular in temperate gardens.
• Botanists study the deciduousnesses of various species to understand seasonal adaptation.
• The deciduousnesses of these plants help them survive harsh winters.