manna

Definition:

Manna was a white, grain-like food that God provided for the Israelites to eat during the 40 years of living in the wilderness after they left Egypt.

Manna looked like white flakes which appeared each morning on the ground under the dew. It tasted sweet, like honey.
The Israelites gathered the manna flakes every day except on the Sabbath.
On the day before the Sabbath, God told the Israelites to gather twice the amount of manna so they wouldn't have to gather it on their day of rest.
The word "manna" means "what is it?"
In the Bible, manna is also referred to as "bread from heaven" and "grain from heaven."

Other ways to translate this term could include, "thin white flakes of food" or "food from heaven."
Also consider how this term is translated in a Bible translation in a local or national language. (See: How to Translate Unknowns)