noun Descargar 🔗Compartir Efemérida Any of the many fragile insects of the order Ephemeroptera that develop in fresh water and live very briefly as winged adults. Examples : "Along the riverbank, we saw hundreds of mayflies swarming, their brief adult lives already nearing their end. " A lo largo de la orilla del río, vimos cientos de efeméridas pululando, sus breves vidas adultas ya llegando a su fin. insect animal biology nature ecology Chat con IAJuego de vocabularioPracticar lectura