1. Indicating a lack of maturity
   "infantile behaviour"
   - childish 
2. Of or relating to infants or infancy
   "infantile paralysis" 
3. Being or befitting or characteristic of an infant
   "infantile games"

See also: immature, infancy, young

• lanceolate spleenwort
• lancer
• lancers
• lancet
• lancet arch
• lancet window
• lancet-shaped
• lancetfish
• lancewood
• lancewood tree
• Lanchou
• Lanchow
• lancinate
• lancinating
• land
• land agent
• land area
• land cress
• land development
• land grant
• land mile
• land mine
• Land of Enchantment
• Land of Lincoln
• Land of Opportunity