1. Contributing to the process of nitrogen fixation

See also: nitrogen fixation

• melena
• Meles
• Meles meles
• Melia
• Melia Azadirachta
• Melia azedarach
• Melia azederach
• Meliaceae
• Melicocca
• Melicocca bijuga
• Melicocca bijugatus
• Melicoccus
• Melicytus
• melilot
• melilotus
• Melilotus alba
• Melilotus officinalis
• Melina Mercouri
• Melinae
• meliorate
• melioration
• meliorative
• meliorism
• meliorist
• Meliphagidae