formation of a blood clot
"Formation of a blood clot is like assembling a raft in the middle of a raging river. Platelets and a fibrin meshwork assemble on the injured vascular endothelial surface while blood continues to flow through the vessel."
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.