What does "miller" mean?

Additional senses

1. 2.(Zoöl.) (a) A moth or lepidopterous insect; -- so called because the wings appear as if covered with white dust or powder, like a miller's clothes. Called also moth miller. (b) The eagle ray. (c) The hen harrier. [Prov. Eng.] Miller's thumb. (Zoöl.) (a) A small fresh-water fish of the genus Uranidea (formerly Cottus), as the European species (U. gobio), and the American (U. gracilis); -- called also bullhead. (b) A small bird, as the gold-crest, chiff- chaff, and long-tailed tit. [Prov. Eng.]