1 (Windows 7 starter edition does not support AVCHD files out of the box, and so requires a third-party player.) In editions of Windows 7 that do support AVCHD files, Windows Media Player can index content in these files, and Windows Explorer can create thumbnails for each clip.
2. infantile-of or relating to infants or infancy; infantile paralysis. 3. infantile-being or befitting or characteristic of an infant; infantile games. young, immature - (used of living things especially persons) in an early period of life or development or growth; young people.
Definition of infant. 1  1 : a child in the first period of life. 2  2 : a person who is not of full age : minor.