| 释义 |
ex·trac·tion
\ikˈstrakshən, ek-\ noun
(-s)
Etymology: Middle English extraccioun, from Late Latin extraction-, extractio, from Latin extractus + -ion-, -io -ion
1.
a. : the act or process of extracting
< extraction of a tooth >
b. obsolete : extract 2
2. [Middle French (also, act of extracting), from Late Latin extraction-, extractio] : origin, lineage, descent, birth
< a workman of German extraction >
3.
a.
(1) : the proportion of ore that can be separated from the total mined mass of an ore occurrence
(2) : the proportion of valuable metal or mineral recovered from an ore
b. : the proportion of flour obtained from each 100 pounds of milled grain
< an extraction of 74 percent > |