Source : Webster's Revised Unabridged Dictionary (1913)

Nidulate \Nid"u*late\, v. i. [imp. & p. p. {Nidulated}; p. pr. &
   vb. n. {Nidulating}.] [L. nidulari, fr. nidulus, dim. of
   nidus a nest.]
   To make a nest, as a bird. [R.] --Cockeram.