What Is Manna in the Bible?

What the Bible says

Exodus 16:14-15

¹⁴And when it had covered the face of the earth, it appeared in the wilderness small, and as it were beaten with a pestle, like unto the hoar frost on the ground. ¹⁵And when the children of Israel saw it, they said one to another: Manhu! which signifieth: What is this! for they knew not what it was. And Moses said to them: This is the bread, which the Lord hath given you to eat.

Exodus 16:31

And the house of Israel called the name thereof Manna: and it was like coriander seed white, and the taste thereof like to flour with honey.

John 6:31-35

³¹Our fathers did eat manna in the desert, as it is written: He gave them bread from heaven to eat. ³²Then Jesus said to them: Amen, amen I say to you; Moses gave you not bread from heaven, but my Father giveth you the true bread from heaven. ³³For the bread of God is that which cometh down from heaven, and giveth life to the world. ³⁴They said therefore unto him: Lord, give us always this bread. ³⁵And Jesus said to them: I am the bread of life: he that cometh to me shall not hunger: and he that believeth in me shall never thirst.

Douay-Rheims Bible (Challoner revision), public domain.