fulcrum /fulˈkrəm or fŭlˈ/

1. The prop or fixed point on which a lever moves or pivots (mechanics)
2. A support
3. A means to an end (figurative)

• at pleasure
• at point
• at points
• at present
• at press
• at question
• atrabilious
• atrabiliousness
• atracurium
• atracuriums
• atrament
• atramental
• atramentous
• atraments
• atrazine
• atrazines
• atremble
• atresia
• atresias
• at rest
• atria
• atrial
• a trifle
• at right angles
• atrioventricular