Ꝥ (minuscule: ꝥ), or Þ (thorn) with stroke was a scribal abbreviation common in the Middle Ages. It was used for English, Old (ca.450-1100);: þæt (Modern English "that"), as well as Norse, Old: þor-, the Norse, Old: -þan/Norse, Old: -ðan in Norse, Old: síðan,[1] Norse, Old: þat, Norse, Old: þæt, and Norse, Old: þess. In Old English texts, the stroke tended to be more slanted, while in Old Norse texts it was straight. In Middle English times, the ascender of the þ was reduced (making it similar to the Old English letter Wynn, ƿ), which caused the thorn with stroke abbreviation to be replaced with a thorn with a small t above the letter .
Unicode encodes Ꝥ as, and ꝥ at .
A thorn with a stroke on the descender also exists, used historically as an abbreviation for the word "through".[2] The codepoints are, and .