extemporanea
That which is extemporaneous; something effortless but transient or superficial.
rare, uncountable
Oh, life is a glorious cycle of song, / A medley of extemporanea;
Where it comes from
From Latin extemporānea, neuter plural of extemporāneus (“extemporaneous”).
Adapted from the Wiktionary entry extemporanea (CC BY-SA 4.0).