clot

(klŏt)

1. A thick, viscous, or coagulated mass or lump, as of blood.
2. A clump, mass, or lump, as of clay.
3. A compact group: a clot of automobiles blocking the tunnel's entrance.

1. To cause to form into a clot or clots. See Synonyms at coagulate.
2. To fill or cover with or as if with clots.