fertilizer

n. person or thing which fertilizes; organic or chemical substance added to soil to enrich it (i.e. manure), fertiliser

Fertilizers (also spelled fertilisers) are compounds given to plants to promote growth; they are usually applied either via the soil, for uptake by plant roots, or by foliar feeding, for uptake through leaves. Fertilizers can be organic (composed of organic matter), or inorganic (made of simple, inorganic chemicals or minerals). They can be naturally occurring compounds such as peat or mineral deposits, or manufactured through natural processes (such as composting) or chemical processes (such as the Haber process).
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Noun
1. any substance such as manure or a mixture of nitrates used to make soil more fertile
(synonym) fertiliser, plant food
(hypernym) chemical
(hyponym) organic, organic fertilizer, organic fertiliser
(substance-meronym) sodium nitrate, soda niter
(derivation) fertilize, fecundate, fertilise

Substance that adds inorganic or organic plant nutrients to soil and improves its ability to grow crops, trees, or other vegetation. See organic fertilizer, fertilization.

Any organic or inorganic material, either natural or synthetic, used to supply elements (such as nitrogen (N), phosphate (P2O5), and potash (K2O)) essential for plant growth. If used in excess or attached to eroding soil, fertilizers can become a source of water pollution.