The term 'PERTAINING TO SMELL' can be summed up with the crossword solution of OLFACTORY, which is an adjective that means relating to the sense of smell. Olfactory is derived from the Latin word olfacere, which means 'to smell'. This term is used to describe the sense of smell and its related functions, such as the ability to detect odors and distinguish between them. It is also used to refer to the organs and structures involved in the sense of smell, such as the olfactory epithelium and the olfactory bulb.