The term DOT ON AN I is a phrase used to describe the punctuation mark known as an interpunct, which is also sometimes referred to as a middle dot. It is a small dot placed in the middle of a line of text, usually between two words or syllables, and is used to indicate a pause or a break in the sentence. The interpunct is commonly used in languages such as Spanish, German, and Chinese, and is also used in some forms of shorthand.