In common terminology, a baby is the very young offspring of adult human beings, while infant (from Latin īnfāns 'baby, child', literally 'unspeaking') [1] is a formal or specialised synonym. The terms may …

Jan 12, 2026 · Merriam-Webster defines an infant as "a child in the first period of life" but doesn't give any age specifics. It describes a baby as "an extremely young child."

Feb 20, 2026 · As a parent you give your children a good start in life—you nurture, protect, and guide them. Learn about developmental milestones, including emotional and social development, for …

Jun 21, 2026 · The meaning of INFANT is a child in the first period of life. How to use infant in a sentence.

Mar 13, 2025 · Infant development: Birth to 3 months Infant development begins at birth. Consider major infant development milestones from birth to 3 months — and know what to do when something's not …

/ ˈɪn·fənt / Add to word list a baby (Definition of infant from the Cambridge Academic Content Dictionary © Cambridge University Press)

Jun 11, 2025 · An infant is typically a child from birth to 12 months old. Some health professionals may define infancy as extending up to 18 months, especially when talking about development and early …

Different words are used for a baby at different stages of growth. These words are not used in the same way by everyone. For example, the word infant may be used until a baby can walk, or only until the …

Feb 6, 2026 · Learn about the differences between a newborn, infant, baby, and toddler, including the age ranges for each stage and more.

Oct 20, 2025 · Provides information for parents of infants and toddlers.