The term 'minute bit' can be broken down into three crossword solutions: MOTE (4 letters), IOTA (4 letters), and ATOM (4 letters). MOTE is an old English word meaning a small particle or speck of dust. IOTA is the ninth letter of the Greek alphabet, and it is also used to refer to a very small amount of something. ATOM is the smallest unit of matter that can exist, and it is made up of protons, neutrons, and electrons. All three words refer to something very small, and together they form the phrase 'minute bit, ' which is used to describe something that is extremely tiny.