nutritious food; nourishment
Refers to food or substances that provide nutrition and promote health. Somewhat formal or written style.
It is necessary to feed nutritious food to the sick person.
This soup is excellent as nourishment.
滋養 is a noun meaning 'nourishment' or 'nutrition', often used in compounds. 滋養物 adds 物 (thing) to emphasize the food or substance itself.
Compound of 滋養 (nourishment) and 物 (thing). The exact historical derivation is uncertain, but the spelling is conventionally associated with nourishing food.