n. A condition marked by the incomplete development, or absence, of an organ or tissue.
the GNU version of the Collaborative International Dictionary of English
n. Incomplete or faulty development.
n. a defect, retardation, or cessation of the process of generation of blood cells.
The Century Dictionary and Cyclopedia
n. Defective or arrested development in a tissue or an organ.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. failure of some tissue or organ to develop
Word Usage
"Other findings include disseminated intravascular coagulation, bone marrow aplasia with leukopenia and thrombocytopenia, elevated liver enzyme values, hypocalcemia, hyponatremia and rhabdomyolysis."