olivine, peridot

main, principal

centrality

ingredient / (mathematics) entity

(astronomy, mythology) Earth; Terra

stone

(mineralogy) peridotite

songbun (a system of ascribed status in North Korea, based on one's political, social, and economic background and the behaviour of relatives)

a stone / (slang, electronics) a transistor

for grains of rice; one koku is equal to approximately 180 litres / (by extension, historical) for land of famous daimyo or samurai; one koku is also approximately 180 litres