It is actually the coagulation of thousands of ceramic poppies.
c.1400, from Latin coagulationem (nominative coagulatio), noun of action from past participle stem of coagulare (see coagulate).
early 15c., from Latin coagulatus, past participle of coagulare "to cause to curdle," from cogere "to curdle, collect" (see cogent). Earlier coagule, c.1400, from Middle French coaguler. Related: Coagulated; coagulating.
coagulation co·ag·u·la·tion (kō-āg'yə-lā'shən)
The change, especially of blood, from liquid to solid; clotting.
A clot; coagulum.
coagulate co·ag·u·late (kō-āg'yə-lāt')
v. co·ag·u·lat·ed, co·ag·u·lat·ing, co·ag·u·lates
To change from the liquid state to a solid or gel; clot.
The process of changing from a liquid to a gel or solid state by a series of chemical reactions, especially the process that results in the formation of a blood clot. See more at clot.