noun \ˈin-fən(t)-sē\

: the first part of a child's life : the time in your life when you are a baby

: a beginning : an early stage of development

plural in·fan·cies

Full Definition of INFANCY

:  early childhood
:  a beginning or early period of existence
:  the legal status of an infant

Examples of INFANCY

  1. She was often sick during her infancy.
  2. a skill developed in infancy
  3. She has been a member of the church since its infancy.

First Known Use of INFANCY

14th century


noun \ˈin-fən-sē\   (Medical Dictionary)
plural in·fan·cies

Medical Definition of INFANCY

: early childhood
: the legal status of an infant


noun    (Concise Encyclopedia)

In humans, the period of life between birth and the acquisition of language usually one to two years later. The average newborn infant weighs 7.5 lbs (3.4 kg) and is about 20 in (51 cm) long. At birth, infants display a set of inherited reflexes involving such acts as sucking, blinking, and grasping. They are sensitive to light-dark visual contrasts and movements and show a noticeable preference for gazing at the human face; they also begin to recognize the human voice. By 4 months of age most babies are able to sit up, and most begin crawling in 7–10 months; by 12 months most are able to start walking. Virtually all infants begin to comprehend some words several months before they themselves speak their first meaningful words.


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