late 14c., sent "to find the scent of," from Old French sentir "to feel, smell, touch, taste; realize, perceive; make love to," from Latin sentire " to feel, perceive, sense, discern, hear, see" (see sense (n.)).
Originally a hunting term. The -c- appeared 17c., perhaps by influence of ascent, descent, etc., or by influence of science. This was a tendency in early Modern English, cf. scythe, and also scite, scituate. Figurative use from 1550s. Transitive sense "impregnate with an odor, perfume" is from 1690s. Related: Scented; scenting.
late 14c., "scent, smell, what can be smelled" (as a means of pursuit by a hound), from scent (v.). Almost always applied to agreeable odors.
the property of certain substances, in very small concentrations, to stimulate chemical sense receptors that sample the air or water surrounding an animal. In insects and other invertebrates and in aquatic animals, the perception of small chemical concentrations often merges with perception via contact of heavy concentrations (taste), and with other chemoreceptive specializations. See also smell.