کلماتور
Formic aldehyde, regarded as a methylene derivative.
1. A trot or trotting. [Obs.] Sir T. Browne. 2. A shaking; succussion.
A water-tight inclosure, as of piles packed with clay, from which the water is pumped to expose the bottom (of a river, etc.) and permit the laying of foundations, building of piers, etc.