An organism or form that is temporary or short-lived in appearance or existence; something that resembles or exhibits ephemeral characteristics.
From ephemero- (Greek ephemeros 'short-lived') plus -morph (Greek morphe 'form'), literally 'a short-lived form.'
Ephemeromorphs include temporary structures in nature like ice flowers, spring ephemeral wildflowers, and the brief larval forms of insects—shapes that nature sculpts and then erases.
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