odorant
Concise Oxford English Dictionary © 2008 Oxford University Press:
odorant/ˈəʊd(ə)r(ə)nt/
▶noun a substance used to give a particular scent or odour to a product.
– origin ME (as adj. in the sense ‘odorous’): from OFr., pres. part. of odorer, from L. odorare ‘give an odour to’.
'odorant' also found in these Oxford entries:

