upstroke

An upward stroke, as of a brush.

In mech., the traverse of a piston, or of any reciprocating or rocking element of an engine or machine, in which the driving element is moving upward, or the principal driven element is coming up.

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.

the upward stroke of a brush, piston etc

a stroke normally made in an upward direction