Definition: An often humid, yellowish froth produced by fermenting malt worts, and used to brew beer, leaven bread, and also used in certain medicines.

Alright class, settle down now, let’s take a look! Today we’re tackling ‘yeast,’ a word that's quite the treat. The dictionary gives us a clue, oh so neat! It says it’s a “froth,” you see, a yellowish hue, Produced by something fermenting, strong and true. “Malt worts” are involved, a brewing delight, Used to make delicious beer, shining bright! But wait, there's more, don’t you despair, Yeast helps bread rise high in the air! It’s also used for medicines, a helpful role, To keep us feeling healthy and whole. So simply put, my dears, it’s this: Yeast is a tiny living thing, That makes things bubble, grow, and happily sing! Think of it as a little helper, small and fast, Turning sugars into goodness – that's built to last! Do you have any questions about this bubbly friend? Let’s discuss it now, until the very end!