‖Hy′per‐pla″si‐a (?), n. [NL., fr. Gr. υπἕρ over + � conformation, fr. � to mold.] (Med. & Biol.) An increase in, or excessive growth of, the normal elements of any part.
☞ Hyperplasia relates to the formation of new elements, hypertrophy being an increase in bulk of preexisting normal elements. Dunglison.