Capable of being gleaned; able to be picked up or gathered, especially grain or other crops left behind after harvest.
From glean (Old French glener, origin debated, possibly from Latin glendae 'acorns') + -able (capable of being). The suffix makes verbs into adjectives describing possibility.
In medieval times, poor people had legal rights to glean—so 'gleanable' grain wasn't just left behind by accident; it belonged to them by law, making it one of agriculture's oldest welfare systems.
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