Retronasal Aroma

Aroma that is detected when breathing out of the mouth and nose. 

Retronasal aroma is different from the more familiar orthonasal aroma, which is when odors are detected when breathing in. 

Orthonasal and retronasal olfaction send messages to your brain to tell it what you are eating or drinking. While you can taste five basic tastes (sweet, sour, bitter, salty, and umami), you can distinguish thousands of volatile chemical compounds.