Definitions:

1. A laboratory technique that uses an ultracentrifuge or high-speed centrifuge to separate substances based on their size, shape, and density. NOUN
   • Ultracentrifugation allowed scientists to isolate ribosomes from the cell extract.
2. A specialized technique of centrifugation that involves spinning samples at extremely high speeds. NOUN
   • Through ultracentrifugation, the DNA was separated into heavy and light strands.