smiling
type: Concept
definition: Infant smiles are a prototypical expression of early joy. They are a window on the development of positive emotion. [Source: Encyclopedia of Human Development; Smiling]
broader: social development and social behavior
broader: facial expressions

social development and social behavior
type: Concept
narrower: smiling

facial expressions
type: Concept
narrower: smiling

concepts
type: Collection
type: ConceptGroup
member: smiling