tapper 1
/tap"euhr/ , n.
1. a person or thing that taps or strikes lightly.
2. a telegraph key.
[ 1800-10; TAP 1 + -ER 1 ]
tapper 2
/tap"euhr/ , n.
1. a person or thing that taps, as trees for the sap or juice, a blast furnace, cask, or other container for their contents, etc.
2. a person who cuts screw threads into the surface of a circular opening, as of a pipe, nut, etc.
[ bef. 1000; OE taeppere (not recorded in ME); see TAP 2 , -ER 1 ]