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Adjective: trillionth  tril-yunth [N. Amer], tri-lee-unth [Brit]
  1. The ordinal number of one trillion in counting order
Noun: trillionth  tril-yunth [N. Amer], tri-lee-unth [Brit]
  1. One part in a trillion equal parts
    - one-trillionth

Derived forms: trillionths

See also: ordinal

Type of: common fraction, simple fraction, vulgar fraction [Brit]

Encyclopedia: Trillionth