शिशु

shishu chhota bachcha, visheshat: ath varsh tak ki avastha ka bachcha kahalata hai.

• prithvi par upasthit kisi bhi manav ya prani ki sabase pahali avastha shishu avastha kahalati hai.
• janm se ek mahine tak ki ayu ke shishu ko navajat shishu kahate hai jabaki ek mahine se tin sal tak ke bachche ko keval shishu kahate haian. am bolachal ki bhasha mean navajat aur shishu dono ko hi bachcha kahate haian.
• ek any paribhashanusar jab tak balak ya balika ath varsh ke nahian ho jate tab tak ve shishu kahalate haian.