cumulating

from The Collaborative International Dictionary of English v.0.48

Cumulate \Cu"mu*late\ (k?"m?-l?t), v. t. [imp. & p. p.
   {Cumulated} (-l?`t?d); p. pr. & vb. n. {Cumulating}
   (-l?`t?ng).] [L. cumulatus, p. p. of cumulare to heap up, fr.
   cumulus a heap. See {Cumber}.]
   To gather or throw into a heap; to heap together; to
   accumulate.
   [1913 Webster]

         Shoals of shells, bedded and cumulated heap upon heap.
                                                  --Woodward.
   [1913 Webster]