neoteny /nē-otˈə-ni/ or neoteinia /nē-ō-tīˈni-ə/ (biology)

Prolonged retention of larval or immature characteristics or features in the adult form

neotenic /nē-ō-tenˈik/ adjective

neotˈenous adjective

• fourteeners
• fourteens
• fourteenth
• fourteenthly
• fourteenths
• fourth
• fourth dimension
• fourth-dimensional
• fourth estate
• Fourth International
• fourthly
• fourth official
• fourth officials
• Fourth of July
• fourth-rate
• fourths
• fourth wall
• Fourth World
• four-wheel
• four-wheel drive
• four-wheel-drive
• four-wheel drives
• four-wheeled
• four-wheeler
• four-wheelers