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1570s, "likeness made to scale; architect's set of designs," from Middle French modelle (16c., Modern French modèle), from Italian modello "a model, mold," from Vulgar Latin *modellus, from Latin modulus "a small measure, standard," diminutive of modus "manner, measure" (see mode (n.1)).
Sense of "thing or person to be imitated" is 1630s. Meaning "motor vehicle of a particular design" is from 1900 (e.g. Model T, 1908; Ford's other early models included C, F, and B). Sense of "artist's model" is first recorded 1690s; that of "fashion model" is from 1904. German, Swedish modell, Dutch, Danish model are from French or Italian.
1844, from model (n.).
A systematic description of an object or phenomenon that shares important characteristics with the object or phenomenon. Scientific models can be material, visual, mathematical, or computational and are often used in the construction of scientific theories. See also hypothesis, theory.