Miller \Mill"er\ (m[i^]l"[~e]r), n.

1. One who keeps or attends a flour mill or gristmill.

2. A milling machine.

3. (Zo["o]l.)
   (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. (Zo["o]l.)
   (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.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Ray \Ray\, n. [F. raie, L. raia. Cf. Roach.]

(Zo["o]l.)
   (a) Any one of numerous elasmobranch fishes of the order Rai[ae], including the skates, torpedoes, sawfishes, etc.
   (b) In a restricted sense, any of the broad, flat, narrow-tailed species, as the skates and sting rays. See Skate.

Bishop ray, a yellow-spotted, long-tailed eagle ray (Stoasodon n[`a]rinari) of the Southern United States and the West Indies.

Butterfly ray, a short-tailed American sting ray (Pteroplatea Maclura), having very broad pectoral fins.

Devil ray. See Sea Devil.

Eagle ray, any large ray of the family Myliobatid[ae], or [AE]tobatid[ae]. The common European species (Myliobatis aquila) is called also whip ray, and miller.

Electric ray, or Cramp ray, a torpedo.

Starry ray, a common European skate (Raia radiata).

Sting ray, any one of numerous species of rays of the family Trygonid[ae] having one or more large, sharp, barbed dorsal spines on the whiplike tail. Called also stingaree.

Source: Webster's Revised Unabridged Dictionary (1913)