Biology, Medicine, Natural sciences, Sciences A defined occurrence during the observation period of an experiment or study.
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Chemistry, Natural sciences, Physical sciences The stage in a titration at which a change in the colour of an indicator indicates that no more titrant should be added.
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Programming, Sciences Part of a system that serves as a hook, allowing third-party code to intercept and modify behaviour at that point.
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Mathematics, Sciences Either of the two nodes of a graph of degree 1.