food for thought

: material consisting essentially of protein, carbohydrate, and fat used in the body of an organism to sustain growth, repair, and vital processes and to furnish energy

: inorganic substances absorbed by plants in gaseous form or in water solution

: nutriment in solid form

: past tense and past participle of think

: something that is thought: such as

: an individual act or product of thinking

: a developed intention or plan