Tactum
Tactum is a Latin term derived from tangere, meaning “having been touched.” It is the neuter singular form of the perfect passive participle tactus and can function as a neuter adjective or as a nominal form meaning “a touch” or “something touched.” In Classical Latin, tactum is comparatively rare as a stand-alone noun; more common is tactus, which carries the core sense of touch or tactile perception.
In scholarly Latin, tactum may appear in phrases discussing sensation, contact, or perception, particularly in glosses
In modern English-language use, tactum is infrequently employed outside of Latin quotations or etymological contexts. It