Entry 2 senses Webster, 1913

Looper

/(lo͞op"ẽr)/ · Loop·er · IPA /ˈluːpə(ɹ)/

01 n. An instrument, as a bodkin, for forming a loop in yarn, a cord, etc.

1.
An instrument, as a bodkin, for forming a loop in yarn, a cord, etc.
2.
The larva of any species of geometrid moths. See Geometrid.(Zool.) See: Geometrid