tittle

1. (typography) Any small dot, stroke, or diacritical mark, especially if part of a letter, or of a letter-like abbreviation; in particular, the dots over the Latin letters i and j.Examples: "The foure pricks or tittles are these. The first is a full prick or period. The second is a comma or crooked tittle."; "The words "jot" and "tittle" in this passage refer to diacritic marks, that is, dashes, dots, or commas added to a letter to accentuate the pronunciation."; "(the page calls both "a superscript sign (hooklike)" and also a diacritical abbreviation of "er" (er) "tittles")"

2. (by extension) A small, insignificant amount (of something); a modicum or speck.Examples: "I am living fast to see the time when a book that misses its tide shall be neglected, as the moon by day, or like mackerel a week after the season. No man has more nicely observed our climate than the bookseller who bought the copy of this work; he knows to a tittle what subjects will best go off in a dry year, and which it is proper to expose foremost when the weather-glass is fallen to much rain."broadly