**Developer** wrote:

But is coriander a spice or a herb?

Depends on how you use the two words. Herb equals flavoring
plant material that can be locally grown. Spice equals
flavoring plant material that can not be locally grown
without special equipment. Local vs remote. It's not the
official definition set, but some people appear to use a
similar sort of distinction.

So to me basil is an herb (it's growing in my balcony)
while nutmeg is a spice (I would need a hothouse to grow
a nutmeg bush).

There's also seed vs rest of plant, making cinnimon an
herb and peanut butter a spice.