calcium
noun(cal-ci-um)
a silver-white divalent metallic element of the alkaline-earth group occurring only in combination
calcium
noun(cal-ci-um)
a usually dark gray crystalline compound CaC2 used especially for the generation of acetylene and for making calcium cyanamide
calcium
noun(cal-ci-um)
a compound CaCO3 found in nature as calcite and aragonite and in plant ashes, bones, and shells and used especially in making lime and portland cement and as a gastric antacid
calcium
noun(cal-ci-um)
any of a class of drugs (such as verapamil) that prevent or slow the influx of calcium ions into smooth muscle cells and are used especially to treat some forms of angina pectoris and some cardiac arrhythmias
calcium
noun(cal-ci-um)
a white deliquescent salt CaCl2 used in its anhydrous state as a drying and dehumidifying agent and in a hydrated state for controlling dust and ice on roads
calcium
noun(cal-ci-um)
a white, odorless powder C12H10Ca3O14 used especially as a food additive and dietary supplement
calcium
noun(cal-ci-um)
a compound CaCN2 used as a fertilizer and a weed killer and as a source of other nitrogen compounds
calcium
noun(cal-ci-um)
a white powdery salt CaC12H22O14 used especially to supplement bodily calcium stores
calcium
noun(cal-ci-um)
a white crystalline strong alkali Ca(OH)2 that is used especially to make mortar and plaster and to soften water
calcium
noun(cal-ci-um)
a white powder CaCl2O2 used especially as a bleaching agent and disinfectant