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

Type of: aeon, eon

Encyclopedia: Phanerozoic

• semantic relation
• semantic role
• semantically
• semanticist
• semantics
• semaphore
• semaphore plant
• Semarang
• semasiology
• sematic
• semblable
• semblance
• sememe
• semen
• semester
• semester hour
• semestral
• semestrial
• semi
• semi-abstraction
• semi-automatise
• semi-automatize
• semi-climber
• semi-climbing
• semi-detached house