miller noun A small moth having powdery scales on its wings and often attracted to light.
1883 Zeigler and Grosscup Heart of Alleghanies 115 Here, in the still waters under a bridging log, or in some hole amid the exposed water-sunk roots of the rhododendron, lie the king trout, during the middle of the day, on the watch for stray worms, or sill gnats, and millers which flit above, then drop in the waters, with as much wisdom and facility as they hover around and burn up in the candle flame. c1950 (in 2000 Oakley Roamin Man 74) I have a phebby bird that bilt its nest on the porch and my garden is near so the bird ketches all the bugs and millers that lay eggs on the garden stuff. 1986 Pederson et al. LAGS 12 of 42 (28.6%) of LAGS speakers using term were from E. Tenn. 1998 Montgomery Coll. (known to eight consultants). [so called from the resemblance of the powedery scales on the wings to the dust that accumulates at a ghrinding mll; OED miller1 2 1681 ->]
I grew up using the word miller to describe a moth. I don’t think I ever heard Granny or Pap say anything but miller. It was only after I was an adult that I realized most folks say moth instead of miller.
One time I heard somebody say they had a miller fly up their nose and one of The Deer Hunter’s friends said a miller flew in his ear and about drove him crazy fluttering around till he got to the doctor and let him pull it out.