It is often used in scientific terminology to indicate a part or segment of something, particularly in biology and anatomy.
Here are some examples:
* Polymer: A large molecule made up of many repeating parts (monomers).
* Tetramer: A molecule consisting of four parts.
* Oligomer: A molecule consisting of a few parts.
* Monomer: A single part that can be joined to other monomers to form a polymer.
* Polymeric: Relating to or consisting of multiple parts.
* Somite: A segment of a developing embryo (literally "body part").
So, whenever you see "-meros" in a word, it generally refers to a component, segment, or part of a larger whole.