A lower mordent is almost exactly the same as an upper mordent but instead of alternating to the note above the main note they go down to the note below. Lower mordents have a line straight through the middle of the wavy line (like an inverted turn).
What is lower mordent?
Lower Mordent A zigzag symbol with a line through it that is place over the note to indicate a specific embellishment of the note. Also called a mordent. ...
What are upper and lower Mordents?
So if the note written is a “C”, you'll play an upper mordent like “C-D-C” very quickly. A lower mordent, which is a squiggle with a line through it, means the same thing, only you do a turn with the lower note. If the note written was an “E”, you would play “E-D-E” very quickly.