Smell- A Lakṣaṇa (distinguishing characteristic) (property) of matter, which is perceptible to the sense-organ of smell.
vaṇṇarasagaṃdhaphāsā, puggalāṇaṃ tu lakkhaṇaṃ.
(U 28.12)
ghāṇassa gaṃdhaṃ gahaṇaṃ vayamti......gaṃdhassa ghāṇaṁ gahaṇaṃ vayaṃti...
(U 32.48,49)