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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