ug

ulcerating

verb
  1. To cause an ulcer to develop.
    The surface was ulcerated by trauma.
  2. To become ulcerous.
    The tissue
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ultracentrifuging

verb

To submit a material to ultracentrifugation

ululating

verb
  1. To howl loudly or prolongedly in lamentation or joy
  2. To produce a rapid and prolonged series of sharp
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