Osmotolerance

Part of speech: noun

Definitions

1. The capacity of an organism to withstand and function effectively in environments that experience varying osmotic pressure conditions
2. A quality exhibited by specific organisms that allows them to survive and maintain biological processes despite fluctuations in osmotic levels
3. The capability of an organism to endure changes in osmotic pressure without losing function

Etymology: Osmotolerance is a plain technical compound: "osmo-", from the Greek "ōsmos" meaning "a push" or "impulse," which gave modern science the word "osmosis" for the movement of water across a membrane, joined to "tolerance," the ability to endure something. Put together, the term names an organism's capacity to survive shifts in osmotic pressure, the force that drives water across cell membranes. The "osmo-" element is what gives the word its scientific shape. It appears in coinages such as "osmosis" and "osmometer," built on Greek roots and used in modern biology and chemistry rather than in ancient texts. "Tolerance" brings the sense of enduring, so the whole compound reads as "tolerance of osmotic change."