noun

• (pathology, usually uncountable) A disorder characterized by appetite and craving for non-edible substances, such as chalk, clay, dirt, ice, or sand.
• (countable) A magpie.
• (typography, printing, uncountable) A size of type between small pica and English, now standardized as 12-point.
• (typography, uncountable, usually with qualifier) A font of this size.
• (typography, countable) A unit of length equivalent to 12 points, officially ³⁵⁄₈₃ cm (0.166 in) after 1886 but now (computing) ¹⁄₆ in.
• (uncommon, ecclesiastical) A pie or directory: the book directing Roman Catholic observance of saints' days and other feasts under various calendars.
• Archaic form of pika (“small lagomorph”). [Any of several small, furry mammals, similar to guinea pigs, but related to rabbits, of the family Ochotonidae, from the mountains of North America and Asia.]
• (space flight) Abbreviation of phenolic impregnated carbon ablator.
• (anatomy) Initialism of posterior inferior cerebellar artery. [(anatomy) An artery that usually branches from the vertebral artery below its junction with the contralateral vertebral artery to form the basilar artery and that supplies much of the medulla oblongata, the inferior portion of the cerebellum, and part of the floor of the fourth ventricle.]