"Coriander root" refers to the underground part of the coriander plant, which is commonly used in cooking. It has a strong, earthy flavor and is often used in Thai and Asian cuisines for its aromatic taste. Full definition
Add remaining oil to the non stick pot, along with chopped carrot / celery / onion / garlic / coriander root + stem and cumin. (sammyandbella.com)
I decided to adapt the recipes I found on the web to ingredients are easier to find — considering my Italian readers — e.g. ginger for galangal, limes for kaffir lime leaves, cilantro for coriander root. (thebluebride.com)
Zest the 1/2 lime and place zest in a blender or food processor, along with its juice (zap in the microwave after you've finished zesting it, for 30 secs, to get more juice out), coriander roots and stems, parsley leaves, chilli powder, and softened butter. (sammyandbella.com)