Die Zauberflöte, K. 620

Seedlings are elongated and have closed cotyledons in the dark (aetiolated) while the hypocotyls are short and the cotyledons are open in the light (de-aetiolated).

At mid-career, though, boredom has a more insidious effect. … It can be a devastating experience to no longer feel excited by what you do or to feel you're not an integral part of an organization. That's when the doldrums set in.

His sergeant gigged him for an unmade bunk.