seed

¹seed

noun \ˈsēd\

plural seed or seeds

Definition of 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 tick

2

: 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>