Food is, in the popular sense, whatever one eats in contradistinction to what one drinks. Thus, we speak of food and drink, of wholesome, unwholesome, or indigestible food; but in a more scientific sense whatever, when taken into the digestive organs, serves to build up structure or supply waste may be termed food; the word is extended to plants to signify whatever taken in any way into the organism serves similar purposes; thus, we speak of liquid food, plant food, etc.; in this wider sense food is closely synonymous with nutriment, nourishment, and sustenance. Diet refers to the quantity and quality of food habitually taken, with reference to preservation of health. Victuals is a plain, homely word for whatever may be eaten; we speak of choice viands, cold victuals. Nourishment and sustenance apply to whatever can be introduced into the system as a means of sustaining life; we say of a convalescent, he is taking nourishment. Nutriment and nutrition have more of scientific reference to the vitalizing principles of various foods; thus, wheat is said to contain a great amount of nutriment. Regimen considers food as taken by strict rule, but applies more widely to the whole ordering of life. Fare is a general word for all table supplies, good or bad; as, sumptuous fare; wretched fare. Feed, fodder, and provender are used only of the food of the lower animals, feed denoting anything consumed, but more commonly grain, fodder denoting hay, cornstalks, or the like, sometimes called "long feed;" provender is dry feed, whether grain or hay, straw, etc. Forage denotes any kind of food suitable for horses and cattle, primarily as obtained by a military force in scouring the country, especially an enemy's country.