Here's why there's no one scientific term:
* Size is relative: What's small to a human might be enormous to a bacteria.
* Different fields use different terms: Biology might use "microscopic" or "miniature", while astronomy might use "dwarf" or "petite".
* Specific terms exist for specific objects: For example, "dwarf planet" is a specific term in astronomy.
Instead of a single scientific name, we use specific terms based on the object or context:
* Microscopic: For things too small to be seen with the naked eye.
* Miniature: For things that are smaller than usual.
* Petite: For small in size, often used to describe people.
* Dwarf: For small in size, often used to describe stars or planets.
To get a more specific answer, you need to tell me what you're referring to. What is it that you want to call "small"?