Definitions for "Failure to Thrive"
A child who is making little or no steady progress in growth and development. (infant, to him/her, unable to thrive, at birth)
A condition in some children below the third percentile in weight and height (compared to other children of the same age) caused by problems with feeding and/or caregiving.
Slow growth and development of a baby, characterized by failure to gain weight, delayed development, unwillingness to interact, and gastrointestinal problems. Failure to thrive is almost always the result of inadequate nutrition, whether because of neglect or illness.