The term 'Tiny Portion' can be represented by two crossword solutions: ATOM (4 letters) and JOT (3 letters). ATOM is a word used to describe the smallest particle of an element that still retains its chemical properties. JOT is a word used to describe a very small amount or quantity of something. Together, these two words represent a tiny portion of something, which could be anything from a physical object to an abstract concept.