1. With reference to the origin or beginning
   - primitively, originally 
2. Before now
   - in the first place, earlier, to begin with, originally

Encyclopedia: In the beginning

• Meryta sinclairii
• mesa
• Mesa Verde National Park
• Mesabi Range
• Mesantoin
• Mesasamkranti
• mescal
• mescal bean
• mescal button
• mescaline
• mesclun
• Mesembryanthemum
• Mesembryanthemum crystallinum
• Mesembryanthemum edule
• mesencephalon
• mesenchyme
• mesenteric
• mesenteric artery
• mesenteric plexus
• mesenteric vein
• mesenteron
• mesentery
• mesh
• mesh topology
• meshed