Small porous pellet or bead of ammonium nitrate.

Also called sprill. Form of fertilizer which has been encapsulated with a biodegradable coating. The coating is formulated to dissolve within a given period of time, depending on various environmental factors. Prill is used in slow-release fertilizers. It is also used to coat certain micronutrients in order to keep them available to plants as they are needed.

Prill is a small aggregate of a material, most often a dry pellet, usually formed from a liquid. Prills are formed by allowing drops of the prill substance to congeal in mid-air by being dripped from the top of a tall Prilling Tower. Fertilizers (ammonium nitrate, urea, NPK) and some detergent powders are commonly manufactured as prills.

The brill.

A nugget of virgin metal.

The button of metal from an assay.

Small pieces of pure precious metal extracted from assay samples. Usually resembling a cone shape in appearance.

flattened disc or tablet

Ore selected for excellence.

A stream.

To flow.