"tonicity is like osmotic pressure because it is influenced only by solutes that are too big to cross the membrane concentration refers to each individual type of molecule "
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.