concrete(redirected from C20 (engineering))
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concrete(kŏn′krēt) (kŏn-krēt′) [L. concretus, solid]
Condensed, hardened, or solidified.
n solid or semi-solid plant extract obtained by washing with an organic solvent, such as hexane. It has a fatty or waxy consistency and comprises pigments, wax, and essential oils.
mixture of cement and reinforcing gravel or stones used in the surfacing of yards, passageways, milking parlors and the like; critical to the good condition of feet and hooves of farm livestock. Excessive wear due to a too-abrasive surface causes footrot of pigs and epidemic lameness in dairy herds.