Hy`per*pla"si*a (?), n. [NL., fr. Gr. 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.
© Webster 1913.