Here you will find one or more explanations in English for the word Upstrokes.
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Upstroke
Upstroke Up"stroke`, n.
An upward stroke, especially the stroke, or line, made by a
writing instrument when moving upward, or from the body of
the writer, or a line corresponding to the part of a letter
thus made.
Some upstroke of an Alpha and Omega. --Mrs.
Browning.
Meaning of Upstrokes from wikipedia