- em, pica em, pica - a linear unit (1/6 inch) used in printing
--1 is a kind of linear unit
--1 is a part of inch, in
--1 has parts: point; en, nut - Pica, genus Pica - magpies
--2 is a kind of bird genus
--2 is a member of Corvidae, family Corvidae
--2 has members: magpie - geophagy, geophagia, pica - eating earth or clay or chalk; occurs in some primitive tribes or sometimes in cases of nutritional deficiency
--3 is a kind of eating, feeding