The Collaborative International Dictionary of English v.0.48:
Neoplasia \Ne`o*pla"si*a\ (n[=e]`[-o]*pl[=a]"zh[i^]*[.a]), n. [NL., fr. Gr. ne`os new + pla`ssein to form, mold.] (Physiol. & Med.) Growth or development of new material; neoplasty. [1913 Webster]WordNet (r) 3.0 (2006):
neoplasia n 1: the pathological process that results in the formation and growth of a tumor