Meaning

noun the state of being sensitive (as to an antigen)

noun (psychology) the process of becoming highly sensitive to specific events or situations (especially emotional events or situations)

noun rendering an organism sensitive to a serum by a series of injections

originEtymology tree English sensitise Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English sensitisation From sensitise + -ation.

Etymology from Wiktionary, CC BY-SA 3.0