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seed
1 a: the fertilized ripened ovule of a flowering plant containing an embryo and capable normally of germination to produce a new plant; broadly : a propagative plant structure (as a spore or small dry fruit) b: a propagative animal structure: (1): milt, semen (2): a small egg (as of an insect) (3): a developmental form of a lower animal—see seed tick2: a small usually glass and gold or platinum capsule used as a container for a radioactive substance (as radium or radon) to be applied usually interstitially in the treatment of cancer <implantation of radon seeds for bladder cancer>
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