What is the X in X-mas?
1756, in reference to plants, from transplant (v.); in reference to surgical transplanting of human organs or tissue it is first recorded 1951, but not in widespread use until Christiaan Barnard performed the world's first successful heart transplant in 1967 at Groote Schuur Hospital, Cape Town, South Africa. Meaning "person not native to his place of residence" is recorded from 1961.
transplant trans·plant (trāns-plānt')
v. trans·plant·ed, trans·plant·ing, trans·plants
To transfer a tissue or an organ from one body or body part to another. n. (trāns'plānt')
The act or process of transplanting.
The tissue or organ so used.
in horticulture, plant or tree removed from one location and reset in the ground at another. Most small deciduous trees may be moved with no soil attached to their roots. Trees of more than 7.5 cm (3 inches) in trunk diameter, however, are best moved balled and burlapped, that is, with a ball of earth enclosing the roots held in place with burlap.