[Urbane Guerrilla]

Coriander seeds taste like a component of curry powder, in which they often figure. Bust 'em up in a grinder. They're those little tan round things in pickling spice and pickle juice.

Coriander is from Latin coriandrum directly; cilantro comes from the same via a Medieval Latin mutation, celiandrum, and curiously enough is only attested to in the earliest twentieth century, per Mirriam-Webster online. The American usage is to distinguish between these two plant parts doubtless because they are seen in widely divergent cuisines, making the connection less than obvious. Except to lexicographers and other harmless drudges.