has part
material entity
molecular entity
subcellular structure
Components are larger than individual macromolecular entities. It is tricky to define distinction between 'cell component' and 'macromolecular entity', e.g. ribosome. We would like to exclude most protein complexes.
Overlaps with some cellular components from GO
A material entity consisting of at least two macromolecular entities derived from a cell as parts, and that has a function for the cell.