Refugia

Part of speech: noun

Definitions

1. Places that provide shelter for species during periods of adverse environmental conditions
2. Locations where certain plants or animals persist despite changes or challenges in their usual habitats
3. Habitats that protect organisms through times when their normal living environments become inhospitable

Etymology: "Refugia" is the plural of "refugium," a Latin noun formed from "refugere," meaning "to flee back" or "to escape." The Latin word passed into English as a near twin of "refuge," which reached English through Old French. The two words are doublets: they descend from the same Latin source but arrived by different routes, so one came in as an everyday word for shelter and the other stayed a scientific term. The English sense of "refuge" as a place of safety from danger is the familiar one, and "refugium" kept that core while narrowing to a specialist meaning. In ecology, a refugium is a pocket of habitat that survives when surrounding conditions change, such as a cold valley that kept plants alive through an ice age. The plural form "refugia" follows the Latin pattern of neuter nouns ending in "-ium," which gives "-ia" in the plural.