pica

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A printer's unit of type size, equal to 12 points or about ¹/₆ of an inch.
2. n. An equivalent unit of composition measurement used in determining the dimensions of lines, illustrations, or printed pages.
3. n. A type size for typewriters, providing ten characters to the inch.
4. n. An abnormal craving or appetite for nonfood substances, such as dirt, paint, or clay.

Century Dictionary and Cyclopedia

1. n. A genus of oscine passerine birds of the family Corvidæ and sub-family Garrulinæ, having an extremely long graduated tail, the nostrils covered with antrorse plumules, and the plumage iridescent black and white; the magpies. The common magpie of Europe is P. rustica, P. caudata, or P. pica. That of America is commonly called P. hudsonica, but it is scarcely a distinct species. The yellow-billed magpie of California is P. nuttalli. See cut under magpie.
2. n. [lowercase] A bird of the genus Pica; a pie; a magpie.
3. n. In medicine, a vitiated craving for what is unfit for food, as chalk, ashes, or coal.
4. n. Eccles., same as ordinal, 2 .
5. n. An alphabetical catalogue of names and things in rolls and records.
6. n. A size of printing-type, about 6 lines to the inch, intermediate between the sizes English (larger) and small-pica (smaller). It is equal to 12 points in the new system of sizes. (See point, 14 .) The sizes of type respectively called 2-, 3-, 4-, 5-, and 6-line pica have bodies that are equal to 2, 3, 4, 5, and 6 lines of pica. Leads are described by their numerical relation to the pica body, as 6-to-pica or 10-to-pica, according as 6 or 10 set together make a line of pica.

Wiktionary

1. n. A vitiated appetite that craves what is unfit for food, as chalk, ashes, coal, etc.; chthonophagia.
2. n. A size of type.
3. n. A unit of measure equivalent to 12 points.
4. n. The traditional British and American pica, about 4.22 mm, or 0.166 in (close to 1/6 of an inch).
5. n. The PostScript pica, 1/6 of an inch.

GNU Webster's 1913

1. n. The genus that includes the magpies.
2. n. A vitiated appetite that craves what is unfit for food, as chalk, ashes, coal, etc.; chthonophagia.
3. n. A service-book. See Pie.
4. n. A size of type next larger than small pica, and smaller than English.

WordNet 3.0

1. n. a linear unit (1/6 inch) used in printing
2. n. an eating disorder, frequent in children, in which non-nutritional objects are eaten persistently
3. n. magpies.