[plastidn. and adj.] Biology one of the colourless corpuscles found in the protoplasm of vegetable cells around which starch accumulates.
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1885 G. L. Goodale in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) II. i. i. 43Leucoplastids..are found in parts which are normally devoid of chlorophyll, such as tubers, rhizomes, etc.