Capable of being fattened; able to gain weight and become fat readily.
From the verb 'fatten' plus the suffix '-able' (capable of being); a variant of 'fattable' with the fuller verb stem, offering more specificity about readiness for fattening.
Agricultural scientists rate animals by their 'fattenable' potential—some breeds turn grain directly into meat efficiently, while others waste feed, making fattenable genetics worth millions.
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