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- Dictionaryelongation/ˌiːlɒŋˈɡeɪʃn/
noun
- 1. the action or process of lengthening something: "the bird's tails become forked through elongation of their outer feathers"
- 2. the angular separation of a planet from the sun or of a satellite from a planet, as seen by an observer: "Mercury reaches greatest elongation on the 1st, when it will be 27 degrees west of the Sun"
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