Conjuring tricks performed as entertainment.
Mid 19th century: from French, from preste ‘nimble’ + Latin digitus ‘finger’ + -ation.
“What can I say? He’s a master of prestidigitation.”
The last stage of life; old age.
Senectitude comes from the Medieval Latin noun senectitūdō meaning “old age,” which in turn comes from Classical Latin senectūs, a derivative of the noun senex meaning “old man.” Senectitude entered English in the late 1700s, more precisely, in 1796 in Jonathan Swift’s Gulliver’s Travels