Micromeritics is a big word that describes the science of studying really small things, like tiny particles that you can't see with your eyes. Think of it like looking at a handful of sand - you know the sand is made up of little pieces, but you can't see each individual grain without using something like a magnifying glass.
Scientists who study micromeritics use tools to measure and analyze these tiny particles, like how big they are, how they are shaped, and even how much they weigh. They also study how these particles behave and interact with each other, which can help us understand how materials like medicines and powders work.
So essentially, micromeritics is all about studying the really small things in the world, and using those observations to learn more about materials that we use in our everyday lives.