The Collaborative International Dictionary of English v.0.48:

Nuncupative \Nun*cu"pa*tive\, a. [L. nuncupativus nominal: cf.
   F. nuncupatif.]
   1. Publicly or solemnly declaratory. [Obs.]
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   2. Nominal; existing only in name. [Obs.]
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   3. Oral; not written.
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   Nuncupative will or Nuncupative testament, a will or
      testament made by word of mouth only, before witnesses, as
      by a soldier or seaman, and depending on oral testimony
      for proof. --Blackstone.
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