Pleistocene

adj (geology 地质) of the epoch in the earth's history that started about a million years ago and lasted for about 800000 years, when glaciers covered most of the northern hemisphere 更新世的.

pleasantness, pleasantry, please, pleased, pleasing, pleasurable, pleasurably, pleasure, pleasure-boat, pleasure-craft, pleasure-ground, pleasure-seeking, pleat, pleb, plebeian, plebeian (also pleb), plebiscite, plectrum, pled, pledge, plenary, plenipotentiary, plenitude, plenteous, plenteously, plentiful, plentifully, plenty, plenty of, pleonasm, pleonastic, plethora, pleurisy, plexus, pliability, pliable, pliancy, pliant, pliantly, pliers,