in·fan·cy /ˈɪnfən(t)si/
  幼年,初期,幼兒期
  in·fan·cy /ˈɪnfənsɪ/ 名詞
  嬰兒期(兩歲以內)
  In·fan·cy n.
  1. The state or period of being an infant; the first part of life; early childhood.
     The babe yet lies in smiling infancy.   --Milton.
     Their love in early infancy began.   --Dryden.
  2. The first age of anything; the beginning or early period of existence; as, the infancy of an art.
     The infancy and the grandeur of Rome.   --Arbuthnot.
  3. Law The state or condition of one under age, or under the age of twenty-one years; nonage; minority.
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  infancy
       n 1: the early stage of growth or development [syn: babyhood, early
            childhood]
       2: the earliest state of immaturity [syn: babyhood]