The term 'minute portion' can be broken down into three parts: DOT (3 letters), PARTICLE (8 letters), and IOTA (4 letters). DOT is a small round mark used to indicate a point or separate parts of a sentence. PARTICLE is a minute amount of matter, such as a dust PARTICLE. IOTA is the smallest letter in the Greek alphabet, and it is often used to represent a very small amount or quantity. Together, these three words describe a very small portion of something.