1. The period from about 540 million years ago until the present
   - Phanerozoic, Phanerozoic eon

Type of: aeon, eon

• parasitology
• parasol
• parasol mushroom
• parasympathetic
• parasympathetic nervous system
• parasympathomimetic
• parasynthetic
• paratactic
• parataxis
• paratha
• Parathelypteris
• Parathelypteris novae-boracensis
• Parathelypteris simulata
• parathion
• parathion poisoning
• parathormone
• parathyroid
• parathyroid gland
• parathyroid hormone
• paratrooper
• paratroops
• paratyphoid
• paratyphoid fever
• paraumbilical vein
• paraxial