| pertaining to creatures without a backbone |
| warm-blooded vertebrate with feathers, wings, scaly legs and beak which bear young in shelled eggs |
| model (mŏd'l) Pronunciation Key
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. |