n. The act of triturating, or reducing to a fine powder by grinding. Trituration is a dry process, and thus distinguished from levigation.n. In pharmacy, a finely comminuted powder: as, a trituration of elateriu.n. In physiology, reduction to pulp by grinding between the teeth; molar mastication, or some corresponding process: as, the trituration of food before swallowing; trituration in the gizzard of a bird is assisted by little pebbles swallowed.