agenesis
age·ne·sis
noun
1.
imperfect development; nondevelopment of a part
Origin
From a- + -genesis.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.