Custard Powder dust is actually explosive (as is flour and sugar dust.) The dust has to first form a dust cloud, which if ignited in a confined space will explode. The organic particles in such dust clouds combust almost instantly, releasing carbon dioxide and steam in an explosion.
PPDB, the paraphrase database (0.00 / 0 votes) Rate these synonyms: List of paraphrases: estimation, estimating, estimates, estimated, assess, calculate, appreciation, evaluate, forecast, calculation, assessment, calculating, estimations, assessing, forecasts.
This term alludes to a baseball field, which is always an enclosed space. The expression is basically an extension of the somewhat earlier in the ballpark, meaning within a reasonable range, and out of the ballpark, beyond a reasonable range. ballpark estimate/figure. a number which is only approximate, but which should be near to the correct number We're expecting sales of the book to generate around $10,000 dollars, although obviously that's just a ballpark figure.