extraction

英 [ɪk'strækʃ(ə)n; ek-] 美[ɪk'strækʃən]

• n. 取出；抽出；拔出；抽出物；出身

1. the process of obtaining something from a mixture or compound by chemical or physical or mechanical means

2. properties attributable to your ancestry;

"he comes from good origins"

3. the act of pulling out (as a tooth);

"the dentist gave her a local anesthetic prior to the extraction"