The Collaborative International Dictionary of English v.0.48:

Nucumentaceous \Nu`cu*men*ta"ceous\, a. (Bot.)
   See Nucamentaceous.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Nucamentaceous \Nu`ca*men*ta"ceous\, a. [See Nucament.] (Bot.)
   Like a nut either in structure or in being indehiscent;
   bearing one-seeded nutlike fruits. [Written also
   nucumentaceous.]
   [1913 Webster]