c (1): an outgrowth of an organism that differentiates into a new individual :gemma(2): an outgrowth having the potential to differentiate and grow into a definitive organ or part :primordium<an embryonic limb bud>
Small lateral or terminal protuberance on the stem of a vascular plant that may develop into a flower, leaf, or shoot. Buds arise from meristem tissue. In temperate climates, trees form resting buds that are resistant to frost in preparation for winter. Flower buds are modified leaves.