The Dot Over "i" and "j" Has a Secret Name!

That small but significant mark perched atop the lowercase letters 'i' and 'j' is known as a tittle, a term with roots in the Latin word "titulus," meaning "inscription" or "heading." This seemingly minor detail emerged from a practical necessity in medieval handwriting. Beginning in the 11th century, scribes often employed a dense, cramped style known as Gothic minuscule. In this script, numerous letters, including 'i', 'm', 'n', and 'u', were composed of similar vertical strokes called minims. Without a distinguishing mark, words containing sequences of these letters, such as "minimum," became incredibly difficult to decipher, appearing as a series of identical lines.

To resolve this ambiguity and improve readability, scribes began adding a small mark above the 'i'. Initially, this mark was a slanted (Review) dash, which over several centuries, gradually evolved into the familiar small dot we use today. This diacritical mark served to clearly individualize the 'i' amidst the "thicket of handwriting," a crucial aid for readers navigating the tightly packed texts of the time.

The letter 'j' later inherited its tittle because it originated as a variant of 'i'. Scribes would often use a "long i" (which resembled a 'j') at the end of words or in Roman numerals. When 'j' eventually became a distinct letter in the 16th century, the tittle remained with it. Beyond its specific role with 'i' and 'j', the word "tittle" can broadly refer to any small dot, stroke, or diacritical mark in typography. Its historical significance is even embedded in phrases like "every jot and tittle," emphasizing meticulous attention to the smallest details.