D defs.my
Entry 5 senses Webster, 1913

Ablation

/ə-blā'-shən/ · Ab·la·tion · IPA /əˈbleɪ.ʃn̩/
01 n. A carrying or taking away; removal.
  1. 1.
    A carrying or taking away; removal.
  2. 2.
    Extirpation.(Med.)
  3. 3.
    Removing or destroying of a body tissue, especially by a surgical procedure.(Med.)
  4. 4.
    Wearing away; superficial waste, as of glacial ice or snow.(Geol.)
  5. 5.
    Wearing away of the outer layers of a protective shield or surface by the heat and aerodynamic forces caused by flying through the atmosphere at hypersonic speed, as during reentry from space; as, ablation of the heat shield during reentry.(Aerospace)