Masked a.
 1. Wearing a mask or masks; characterized by masks; concealed; hidden.
 2. Bot. Same as Personate.
 3. Zool. Having the anterior part of the head differing decidedly in color from the rest of the plumage; -- said of birds.
 Masked ball, a ball in which the dancers wear masks.
 Masked battery Mil., a battery so placed as not to be seen by an enemy until it opens fire. --H. L. Scott.
 Masked crab Zool., a European crab (Corystes cassivelaunus) with markings on the carapace somewhat resembling a human face.
 Masked pig Zool., a Japanese domestic hog (Sus pliciceps). Its face is deeply furrowed.

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 Pig, n.
 1. The young of swine, male or female; also, any swine; a hog. “Two pigges in a poke.”
 2. Zool. Any wild species of the genus Sus and related genera.
 3.  An oblong mass of cast iron, lead, or other metal. See Mine pig, under Mine.
 4. One who is hoggish; a greedy person. [Low]
 Masked pig. Zool. See under Masked.
 Pig bed Founding, the bed of sand in which the iron from a smelting furnace is cast into pigs.
 Pig iron, cast iron in pigs, or oblong blocks or bars, as it comes from the smelting furnace. See Pig, 4.
 Pig yoke Naut., a nickname for a quadrant or sextant.
 A pig in a poke (that is, bag), a blind bargain; something bought or bargained for, without the quality or the value being known. [Colloq.]