No, I thought cilantro was just a word Americans used for coriander, that they were synoyms. It appears more correctly that cilantro is the leaves, and coriander the seeds.
Always thought they were the same thing, but apparently not exactly:
"While leafy cilantro (also called "Chinese parsley" and sometimes "coriander leaves") and coriander seeds come from the same plant, you'd never know it from their aromas and flavors. They are entirely different. The herb...