AskDefine | Define hypoplasia

Dictionary Definition

hypoplasia n : underdevelopment of an organ because of a decrease in the number of cells

User Contributed Dictionary



  1. being hypoplastic


being hypoplastic

Extensive Definition

Hypoplasia is underdevelopment or incomplete development of a tissue or organ. Although the term is not always used precisely, it properly refers to an inadequate or below-normal number of cells. Hypoplasia is similar to aplasia, but less severe. It is the opposite of hyperplasia (too many cells).
The name is derived from the Greek: hypo, meaning low, and plasis, which refers to molding or forming. The adjective form is hypoplastic.
Hypoplasia can be present in any tissue or organ. It is descriptive of many medical conditions such as:


See also

  • Aplasia, when an organ (or part of an organ) is entirely missing
  • Atrophy, when an existing part wastes away
  • Dysplasia, abnormal development of an organ or extremity
  • Neoplasia, new, disordered growth of tissue
hypoplasia in French: Hypoplasie
hypoplasia in Italian: Ipoplasia
hypoplasia in Polish: Hipoplazja
hypoplasia in Portuguese: Hipoplasia
hypoplasia in Russian: Гипоплазия
hypoplasia in Ukrainian: Гіпоплазія
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