Definition - The little dot over the i and the j.
Note: It first appeared in 11th-century Latin manuscripts where it was used to differentiate i from neighboring letters.

Etymology -
It derives from the Latin titulus, inscription, but Wycliffe used it to translate the concept denoted by the Late Latin apex, accent mark over a vowel.

Oxford English Dictionary -
Its first citation is from 1382:
"Til heuen and erthe passe, oon i […] or titil […] shal nat passe fro the lawe, til alle thingis be don."
(Wyclif Matt. v. 18)

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