ultramicrotome /ul-trə-mīˈkrə-tōm/

A microtome for cutting ultra-thin sections for examination with the electron microscope

ultramicrotomy /-otˈə-mi/ noun

• at the latest
• at the least
• at the mercy of
• at the most
• at the outside
• at the point of
• at the ready
• at the risk of
• at the same time
• at the sharp end
• at the slope
• at the time
• at the top of one's voice
• at the top of the tree
• at the uptak
• at the wheel
• at the worst
• attic
• Attic
• Atticise
• Atticised
• Atticises
• Atticising
• Atticism
• Atticize