explant

noun

piece of tissue removed from body or from a plant

Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Italic *eks Latin ex Latin ex-der. Middle French ex-bor. Middle English ex- English ex- English plant English explant From ex- + plant.

Any portion taken from a plant or an animal that will be used to initiate a culture. It can be a portion of the shoot, or of the leaves, or even just some cells.

verb

To remove something, such as a medical device, that has been implanted.
“Fifty chapters are dedicated to this subject and explain complex issues such as managing radiation induced urethral stricture, reconstruction of the neophallus urethra, methods of explanting urethral stents, and salvaging failed slings and artificial urinary sphincters.”