What does prill mean?
A prill is a tiny pellet, bead, or rounded mass, most often made from metal, fertilizer, or another material that can be melted and formed into small spheres. In industry, the word distinguishes compact, relatively uniform granules from irregular powder or larger lumps. The verb prill describes the process of producing these pellets, as in the prilling of molten fertilizer. Prill can also mean a prank in older or dialectal informal English, although this use is now uncommon. The word is especially useful in technical and manufacturing contexts because it identifies not merely a small object but a deliberately formed rounded unit. Its narrow modern associations contrast with the more general term pellet, which can refer to material of many shapes and compositions.
A small pellet, bead, or rounded mass, especially one formed from metal, fertilizer, or another granular substance.
"The prills cooled into hard, evenly sized spheres."
Common in technical and industrial contexts; the separate sense meaning a prank is uncommon and informal.
To form a substance into small pellets or rounded granules, especially by cooling it from a molten state.
"The plant uses a cooling tower to prill the molten fertilizer."
Chiefly used in technical and industrial contexts.
The plural is regular and is used particularly when referring to individual pellets or granules.
"The damaged prills were removed from the cooling tower."
From molten fertilizer to compact fuel pellets, prills are tiny spheres designed to be counted, stored, and handled without crumbling.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does prill come from?
The precise origin of prill is uncertain, and its historical development is not fully documented. Older usage connected the word with a small pill or pellet, a sense that developed into the modern term for a tiny rounded mass. Its later technical use followed the development of processes in which molten substances were formed into discrete spherical granules.
Related word forms
How prill is actually used
The industrial sense is relatively specialized, while the sense meaning a prank is uncommon and associated with older or dialectal informal usage.
Easily confused with prill
A pill is normally a solid dose of medicine intended to be swallowed, whereas a prill is a small pellet or rounded mass and is often associated with industrial or granular materials.