The Collaborative International Dictionary of English v.0.48:

Particularize \Par*tic"u*lar*ize\, v. t. [imp. & p. p.
   Particularized; p. pr. & vb. n. Particularizing.] [Cf. F.
   particulariser.]
   To give as a particular, or as the particulars; to mention
   particularly; to give the particulars of; to enumerate or
   specify in detail. [Also spelled particularise.]
   [1913 Webster]

         He not only boasts of his parentage as an Israelite,
         but particularizes his descent from Benjamin.
                                                  --Atterbury.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

particularise \particularise\ v. t.
   Same as particularize. [Chiefly Brit.]
   [PJC] particularised

WordNet (r) 3.0 (2006):

particularise
    v 1: be specific about; "Could you please specify your criticism
         of my paper?" [syn: specify, particularize,
         particularise, specialize, specialise] [ant:
         generalise, generalize]