The outermost layer of the pericarp (fruit wall), forming the skin or rind of the fruit. It often provides protection against water loss, pathogens, and physical damage.
From Greek 'exo' (outside) and 'karpos' (fruit), meaning 'outside fruit layer.' The term was established in 19th-century botanical literature as scientists developed detailed fruit anatomy terminology.
The exocarp is nature's gift wrapping - it can be paper-thin like grape skin, thick and waxy like citrus rind, or even spiky like a chestnut burr, all designed to protect the precious cargo inside!
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