ablation

1. The surgical removal of a body part, an organ, or especially a tumor; the removal of an organ function; amputation. (countable, uncountable)
2. The removal of a component of an AI system. (countable, uncountable)
3. The removal of a glacier by melting and evaporation; the lowering of a land surface by any of several means, as in wind erosion or mass wasting. (countable, uncountable)
4. The depletion of surface snow and ice from a spacecraft or meteorite through melting and evaporation caused by aerodynamic heating. (countable, uncountable)

Plural ablations