extractor

To draw or pull out, often with great force or effort: extract a wisdom tooth; used tweezers to extract the splinter.

To obtain despite resistance: extract a promise.

To obtain from a substance by chemical or mechanical action, as by pressure, distillation, or evaporation.

To remove for separate consideration or publication; excerpt.

1. To derive or obtain (information, for example) from a source.

2. To deduce (a principle or doctrine); construe (a meaning).

3. To derive (pleasure or comfort) from an experience.

Mathematics To determine or calculate (the root of a number).