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.
The defense of infancy is a form of defense known as an excuse so that defendants falling within the definition of an  infant  are excluded from criminal liability for their actions, if at the relevant time, they had not reached an age of criminal responsibility.