The plural form of caducity; instances or qualities of being transient, perishable, or prone to falling away.
From Latin caducitas, derived from caducus (falling, temporary). The term entered English through scientific and philosophical texts discussing the temporary nature of things.
Medieval philosophers used this word to discuss the caducities of earthly possessions—everything material eventually falls apart or becomes worthless, which was a pretty depressing but common theme in their writings.
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