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n. pl. seeds or seed
a. A mature plant ovule containing an embryo.
b. A small dry fruit, spore, or other propagative plant part.
c. Seeds considered as a group: a farmer buying seed.
d. The seed-bearing stage of a plant: The grass is in seed.
a. A larval shellfish or a hatchling fish: released scallop seed in the bay.
b. An egg or cocoon of certain insects: silkworm seed.
3. Something that resembles a seed, as:
a. A tiny bubble in a piece of glass.
b. Medicine A form of a radioactive isotope that is used to localize and concentrate the amount of radiation administered to a body site, such as a tumor.
a. A source or beginning; a germ: the seed of an idea.
b. A small amount of material used to start a chemical reaction.
c. A small crystal used to start a crystallization process.
5. A cell that disperses, especially a cancer cell that spreads from a primary tumor to another location in the body.
6. Archaic
a. Offspring; progeny.
b. Family stock; ancestry.
c. Sperm; semen.
7. Sports A player who has been seeded for a tournament, often at a given rank: a top seed.
v. seed·ed, seed·ing, seeds
a. To plant seeds in (land, for example); sow.
b. To plant (a crop, for example) as seeds in soil.
2. To remove the seeds from (fruit).
3. To furnish with something that grows or stimulates growth or development: a bioreactor seeded with bacteria.
4. Medicine
a. To disperse to, as cancer cells: organs seeded by circulating tumor cells.
b. To disperse or transfer (cancer cells, for example): a needle biopsy that seeded cancer cells into adjacent tissue; seed stem cells onto collagen gels.
5. Meteorology To sprinkle (a cloud) with particles, as of silver iodide, in order to disperse it or to produce precipitation.
6. Sports
a. To arrange (the drawing for positions in a tournament) so that the more skilled contestants meet in the later rounds.
b. To rank (a contestant) in this way.
7. To help (a business, for example) in its early development.
1. To sow seed.
2. To pass into the seed-bearing stage.
3. Medicine To disperse and often multiply, as cancer cells.
1. Set aside for planting a new crop: seed corn; seed potatoes.
2. Intended to help in early stages: provided seed capital for a fledgling business.
go/run to seed
1. To pass into the seed-bearing stage.
2. To become weak or devitalized; deteriorate: The old neighborhood has gone to seed.

[Middle English, from Old English sǣd, sēd; see sē- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


The placing of the best players in separate sections of a draw so that they do not meet until the later rounds.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
References in periodicals archive ?
ISLAMABAD -- Though aerial seeding is not a new phenomenon in the federal capital, it has been decided to use drones for forest densification on the Margalla Hills this time.
Due to improved genetics and production practices, soybean growers are now more aware of the importance of using appropriate seeding rates and seed treatments; this is meant to reduce risk and economically improve yield goals.
If the test date was more than nine months ago, plan to bump up your seeding rate to make up for a declining germination rate--if you're comfortable guessing.
Given two varieties of peas with the same yield potential (1735 kg/ha) but different seed sizes, where variety A has a 100 seed weight of 15 g and variety B has a 100 seed weight of 30 g, variety A would have 124 kg/ha higher actual yield than variety B at current seeding rates of 80 seeds/[m.sup.2].
`One year's seeding results in seven years of weeding" is as true today as it was when expressed hundreds of years ago.
Karina Lefevre fulfilled her seeding, finishing in fifth place with an overall good performance.
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