| 释义 |
pot·ash
I. \ˈpäd.ˌash, -äˌta-, -aash, -aish\ noun
Etymology: singular of pot ashes (from pot (I) + ashes, plural of ash), translation of obsolete Dutch potaschen, plural (whence obsolete Dutch potasch, singular, now Dutch potas)
1.
a. : potassium carbonate; especially : that obtained in colored impure form by leaching wood ashes, evaporating the lye usually in an iron pot, and calcining the residue — compare pearl ash
b. : potassium hydroxide
2.
a. : potassium oxide K2O in combined form as determined by analysis (as of fertilizers)
< soluble potash >
b. : potassium — not used systematically
< potash salts >
< sulfate of potash >
3. : any of several potassium salts (as potassium chloride or potassium sulfate) often occurring naturally and used especially in agriculture and industry
< potash deposits >
< potash fertilizers >
II. transitive verb
: to treat with potash; specifically : to case harden with potassium ferrocyanide |