What's the difference between lopper and loppers?

Lopper

Definition:

• (n.) One who lops or cuts off.
• (v. i.) To turn sour and coagulate from too long standing, as milk.

Example Sentences:

• (1) There was a while when the poppy-loppers almost seemed to be winning and Ross's career dipped.
• (2) There are tools, lots of them, and big ones at that: saws, loppers, spades and diggers.

Loppers

Definition:

Example Sentences:

• (1) There was a while when the poppy-loppers almost seemed to be winning and Ross's career dipped.
• (2) There are tools, lots of them, and big ones at that: saws, loppers, spades and diggers.