bergamot

noun

1. a small evergreen tree (Citrus bergamia) of the rue family, grown in S Europe
2. its pear-shaped, inedible citrus fruit
3. an oil extracted from the rind of this fruit, used widely in perfumery
4. any of several aromatic North American herbs (genera Monarda and Mentha) of the mint family, as horsemint or Oswego tea