The term 'sense of smell' can be described by three different crossword solutions: NOSE (4 letters), olfactory (9 letters), and OLFACTION (9 letters). The sense of smell is the ability to detect odors, and is also known as OLFACTION. It is mediated by specialized sensory cells located in the NOSE, which are known as olfactory receptors. The olfactory receptors detect molecules in the air and send signals to the brain, allowing us to perceive different smells.