The failure of an organ or a body tissue to develop fully and to reach its normal adult size.
Excessive smallness of an organ or part, arising from imperfect development.
n. the underdevelopment of an organ or tissue. Dental hypoplasia is the defective formation of parts of a tooth, for example systemic upset while the tooth is being formed can lead to hypoplastic enamel. Pulmonary hypoplasia is deficient lung development in a fetus or newborn infant for gestational age, with a decrease in lung size or volume. —hypoplastic adj.