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Freebase(0.00 / 0 votes)Rate this definition: Cork cambium. Cork cambium is a tissue found in many vascular plants as part of the periderm. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems.
Secondary Growth & Cork Cambium. Primary growth in plants yields an outer layer known as the epidermis. In plants that don't have lateral growth, this layer is enough to help protect the plant's inner tissues. When a plant's stem gets thicker, however, this epidermis splits and falls off.