metate
/məˈtɑːtɪ/(亦作metate stone)
noun
- (in Central America) a flat or slightly hollowed oblong stone on which materials such as grain and cocoa are ground using a smaller stone（中美洲）平面（或微凹）石磨盘（用以碾磨谷、可可豆等）。
词源
from American Spanish, from Nahuatl métatl.