MOLLUSCA n.
unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or multivalve.…
PACHUCA TANK n.
narrow tank, with a central cylinder for the introduction of compressed air, used in the agitation and settling of pulp (pulverized ore and water) during treatment by the cyanide process; -- so named because, though originally devised in New Zealand, it was first practically introduced in Pachuca, Mexico.…
PACIFY v.
To make to be at peace; to appease; to calm; to still; to quiet; to allay the agitation, excitement, or resentment of; to tranquillize; as, to pacify a man when angry; to pacify pride, appetite, or importunity. "Pray ye, pacify yourself." Shak.