What does comminution mean?
Comminution is the process of breaking a solid material down into progressively smaller particles or fragments, whether by crushing, grinding, milling, or pounding. The term belongs mainly to the vocabulary of mining, metallurgy, and materials engineering, where it describes a crucial early stage of ore processing: rock extracted from a mine must first be reduced to fine particles before valuable minerals can be separated out. Because grinding rock is enormously energy-intensive, comminution accounts for a significant share of industrial energy consumption worldwide, making its efficiency a major concern for engineers. Beyond industry, the word appears in geology, pharmacology, and medicine — for instance, in describing severely fragmented ('comminuted') fractures. Derived from Latin minuere, 'to lessen', via the verb comminuere, 'to break into small pieces', comminution carries a precise, technical register and offers an exact term where everyday language would settle loosely for 'crushing' or 'grinding'.
nounThe action or process of reducing a material to minute particles or fragments, especially by crushing, grinding, or pounding.
- The reduction of solid materials into smaller particles by crushing, grinding, or milling, as in mining and materials processing.
- More generally, the breaking of any substance into fine fragments or powder.
"In ore processing, comminution is the first step after extraction, crushing the rock into fragments fine enough for mineral separation."
"Ball mills are widely used for the comminution of cement clinker before it is ground to final fineness."
"The laboratory report noted extensive comminution of the bone fragments at the fracture site."
Rarely pluralized; the singular is standard even when referring to multiple processes.
"The plant compared several comminutions under different mill configurations."
Every gram of gold in your phone passed through comminution — it takes roughly a tonne of rock ground to dust to yield just a few grams of the metal.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of comminution
Comminution derives from Latin comminuere, formed from com- ('together') plus minuere ('to make small, lessen'), the same root that gives English 'minute', 'diminish', and 'miniature'. The English verb 'comminute' was adopted from the Latin participle in the seventeenth century, and the noun 'comminution' followed as the corresponding process name. It entered technical use through mining and metallurgy, where it remains the standard term for size-reduction operations such as crushing and grinding.
Related word forms
How comminution is actually used
A technical, formal word used chiefly in mining engineering, metallurgy, geology, and materials science; it also appears in forensic and medical contexts describing crushed bone or tissue. Rare in everyday conversation.
Easily confused with comminution
Communion is the sharing or exchange of thoughts and feelings, or the Christian Eucharist rite, whereas comminution is the physical breaking of material into small pieces — the two merely sound alike.