Craving to eat dust, an abnormal desire to eat substances (as chalk or ashes) not normally eaten
Medicine, abnormal craving to eat unusual things such as chalk or hair

1. With reference to typewriters, a fixed-width type font that fits 10 characters to the linear inch. See also pitch.
2. As used by typographers, a unit of measure equal to 12 points or approximately 1/6 inch. See also point1 (definition 1).
3. (12-point) size of type; small pica, 11-point. double pica, 22-point.