1. Moving very rapidly to and fro or up and down

See also: moving, vibrate

• nutritionist's calorie
• MacGuffin
• Mach
• Mach number
• Machaeranthera
• Machaeranthera bigelovii
• Machaeranthera tanacetifolia
• Machaeranthera tortifoloia
• machete
• Machiavelli
• Machiavellian
• Machiavellianism
• machicolate
• machicolation
• machilid
• Machilidae
• machinate
• machination
• machinator
• machine
• machine bolt
• machine code
• machine gun
• machine gunner
• machine language