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

• PCB
• pcm
• PCP
• PCR
• pct
• Pd
• PDA
• PDF
• PDFLP
• pdl
• PDQ
• pe
• pe-tsai
• pea
• pea bean
• pea brain
• pea crab
• pea family
• pea flour
• pea jacket
• pea plant
• pea pod
• pea shooter
• pea soup
• pea tree