acrophilia a love of high mountains and of heights. —acrophile, n. alpinism the climbing of the Alps or any equally high mountain ranges. —alpinist, n. orogenesis the process of the formation of mountains. Also called orogeny. —orogenic, adj. orography Physical Geography. the study of mountains and mountain systems. —orographic, oreographic, oreographical, orographical, adj. orology the scientific study of mountains. —orologist, oreologist, n. —orological, oreological, adj. orometry the measurement of mountains. —orometric, adj. orophilous Botany. referring to orophytes, a class of plants growing on mountains below the timberline.
- plural form of mountain