The stratosphere (/ËstrÃ¦tÉËsfÉªÉr, -toÊ-/) is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. About 20% of the atmosphere's mass is contained in the stratosphere.
The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
augernoun [ C ] uk â /ËÉË.É¡Ér/ us â /ËÉË.É¡É/. âº a tool consisting of a twisted rod of metal attached to a handle, used for making large holes in wood or in the ground. Thesaurus: synonyms and related words.