prepubescent
pre·pu·bes·cent
adjective
1.
(especially of human beings) at the age immediately before puberty; often marked by accelerated growth
Origin
From pre- + pubescent.
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.