keystones
زبان مبدأ: انگلیسی
ترجمه به فارسی
- واژهنامه · Merriam-Webster Collegiate Dictionary key·stone n. Pronunciation: ' kē- ˌ stōn Function: noun Date: circa 1637 1 : the wedge-shaped piece at the crown of an arch that locks the other pieces in place ― see ARCH illustration 2 : something on which associated things depend for support 3 : a species of plant or animal that produces a major impact (as by predation) on its ecosystem and is considered essential to maintaining optimum ecosystem function or structure