Is bia damhna ar bith, comhdhéanta de carbaihiodráití, saill, próitéiní agus uisce, ar féidir ainmhí nó duine a ithe nó a ól, chun iad féin a chothú nó mar is mian leo é.
Is ó phlandaí, ainmhithe nó ó fungais a fhaightear nó a dhéantar bia. Mura itheann ainmhithe nó daoine bia, gheobhaidh siad bás leis an ocras.
Ceiliúrtar Lá Domhanda an Bhia gach bliain ar an 16 Deireadh Fómhair.
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