Synonyms for Pica (same or very similar meaning)
WordNet sense 1 (a linear unit (1/6 inch) used in printing):
em, pica emWordNet sense 2 (magpies):
genus PicaWordNet sense 3 (eating earth or clay or chalk; occurs in some primitive tribes or sometimes in cases of nutritional deficiency):
geophagy, geophagiaFrom the ODE community, based on WordNetadd/edit