By a extractive process.

plural of extractive

(slang, military) The extraction of military forces by longer-range vehicles (helicopter, boat, armoured personnel carrier) whilst under fire from enemy forces.

(arithmetic) The process or result of computing the nth root of a real or complex number. / (dentistry) The process of extracting the root of a tooth from the gum.

plural of root extraction

plural of comedo extraction

(medicine, dermatology) A method of treatment for acne vulgaris, by means of an incision with a large needle or a blade.

(chemistry) The separation of the components of a solution by partitioning between immiscible liquids

plural of intact dilation and extraction

A late-term surgical abortion procedure, involving (in order) dilation of the cervix, removal of the fetus from the uterus to the shoulders, and emptying of the fetal cranium to allow for easier passage of the head through the cervix and vagina.