Herb

In general use, herbs are any plants used for food, flavoring, medicine, or perfume. Culinary use typically distinguishes herbs from spices. Herbs refer to the leafy green parts of a plant (either fresh or dried), while a "spice" is a product from another part of the plant (usually dried), including seeds, berries, bark, roots and fruits.

In botanical English the word "herb" is also used as a synonym of "herbaceous plant".

Herbs have a variety of uses including culinary, medicinal, and in some cases spiritual usage. General usage of the term "herb" differs between culinary herbs and medicinal herbs. In medicinal or spiritual use any of the parts of the plant might be considered "herbs", including leaves, roots, flowers, seeds, resin, root bark, inner bark (and cambium), berries and sometimes the pericarp or other portions of the plant.

The word "herb" is pronounced /ˈhɜːrb/ by most English-speaking countries, but /ˈɜːrb/ is common among North American speakers and those from other regions where h-dropping occurs.

https://en.wikipedia.org/wiki/Herb