"The word 'species' is, like the words 'planet' or 'moon,' a technical term for a concrete phenomenon. One cannot propose a new definition of a planet as "a satellite of a sun that has its own satellite," because this would exclude Venus, and some other planets without moons. A definition of any class of objects must be applicable to any member of this class and exclude reference to attributes not characteristic of this class."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.