| NOUN | event | rarefaction | a decrease in the density / density of something |
|---|
| Meaning | A decrease in the density / density of something. | |
|---|---|---|
| Example | "a sound wave causes periodic rarefactions in its medium" | |
| Broader | concentration | increase / increase / increase in density / density |
| Spanish | enrarecimiento, rarefacción | |
| Catalan | rarefacció | |
| Verbs | rarefy | weaken the consistency of (a chemical substance) |
| rarefy | lessen the density / density or solidity of | |
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