/nɛɪtənəs/ i-NEE-toh-nuhs

Definitions

1. adjective

Relating to or resembling the characteristics of a juvenile, especially in retaining or regaining youthfulness or immature features in adulthood.

“The neotenous traits of the species allowed them to remain competitive in their environment.”

2. noun

A characteristic of an organism that remains youthful in appearance or function beyond the typical age for such traits.

“The study of neotenous traits in animals has led to a greater understanding of their developmental processes.”