What does hypoplastic mean?
Hypoplastic describes something that has not developed fully or has undergone insufficient growth. In medicine and biology, the term usually applies to an organ, tissue, bone, blood-cell population, or other bodily structure whose development was incomplete. A hypoplastic left ventricle, for example, is smaller and less developed than a healthy left ventricle and may not function adequately. The condition may result from restricted blood supply, abnormal tissue formation, or impaired growth during embryonic development, although the term itself does not identify a cause. More broadly, hypoplastic can describe any system, place, or organization that remains underdeveloped. The word is technical in its medical sense but is also understood in formal general writing. It is related to hypoplasia, the noun for incomplete or deficient development. Its principal components are the Greek words hypo, meaning 'under' or 'less than,' and plasia, referring to formation or growth. Consequently, the word carries the basic sense of formation falling below a normal or sufficient level.
Incompletely developed or abnormally reduced in growth, especially with reference to an organ, tissue, or other bodily structure.
"Congenital hypoplastic pulmonary airways can restrict airflow."
Primarily used in medical and biological contexts; often describes a congenital condition or deficient development of tissue.
Inadequate or insufficient in development, growth, or complexity, especially in a non-biological context.
"The committee criticized the hypoplastic infrastructure of the region."
This broader figurative use is formal and less common than the medical sense.
A hypoplastic organ has not merely grown small; it has failed to develop fully.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of hypoplastic
Hypoplastic combines the Greek prefix hypo-, meaning 'under' or 'below,' with a form of Greek plasia, meaning 'formation' or 'growth.' The latter is connected with plassein, 'to form' or 'to mold,' also underlying words such as plasticity and related medical terms in -plasia. The adjective developed within the vocabulary of biological and medical description to denote incomplete or inadequate development.
Related word forms
How hypoplastic is actually used
The adjective is most common in medical and biological contexts and often follows the affected structure, such as 'hypoplastic marrow' or 'hypoplastic ventricle.' In general usage, it is formal and generally means underdeveloped or insufficiently developed rather than merely small.
Easily confused with hypoplastic
Hypoplastic generally means insufficiently developed, whereas aplastic commonly describes complete failure of cellular development or production, as in aplastic anemia.