American Heritage® Dictionary of the English Language, Fourth Edition
- n. A silvery, moderately hard metallic element that constitutes approximately 3 percent of the earth's crust and is a basic component of most animals and plants. It occurs naturally in limestone, gypsum, and fluorite, and its compounds are used to make plaster, quicklime, Portland cement, and metallurgic and electronic materials. Atomic number 20; atomic weight 40.08; melting point 842 to 848°C; boiling point 1,487°C; specific gravity 1.55; valence 2. See Table at element.
Century Dictionary and Cyclopedia
- n. Chemical symbol, Ca; atomic weight, 40. A metal having a light-yellow color and brilliant luster, about as hard as gold, very ductile, and having a specific gravity of about 1.57. It oxidizes readily in moist air, and at a red heat burns vividly, forming calcium oxid, CaO, or quicklime, one of the alkaline earths. On adding water this forms calcium hydrate, Ca(OH)2 or slaked lime. Calcium is not found native in the metallic state, but it unites with most of the non-metallic elements in compounds which are widely distributed in nature and extensively used. The mineral calcite, all limestone or marble, and the chalk deposits are calcium carbonate; gypsum is calcium sulphate; and calcium also enters into the composition of nearly all the native silicates.
- n. A calcium light.
- n. A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks.
GNU Webster's 1913
- n. (Chem.) An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a member of the alkaline earth group of elements. Atomic weight 40. Symbol Ca.
- n. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
- A New Latin word derived by Sir Humphry Davy in 1808, from Latin calx ("lime", "limestone") because it occurs in limestone. (Wiktionary)
- Latin calx, calc-, lime; see calx + -ium. (American Heritage® Dictionary of the English Language, Fourth Edition)
“In muscle cells a rise in calcium is the signal for muscular work.”
“This heightened risk of osteoporosis is probably due to the drastic drop in calcium and vitamin D absorption that occurs with these drugs.”
“Its a HUGE HUGE source of calcium and a way to get calcium from a source other than dairy.”
“It is supposed high in calcium for the growing bones.”
“On the other hand, you can steam only one layer of veg at a time if the steam is to surround and cook them evenly; steaming also takes longer than boiling, because boiling water dissolves and extracts some pectin and calcium from the cell walls, and steaming doesn't.”
“It's high in calcium and probiotics and is much cheaper than cheese.”
“Anyway, those who could drink milk could gain calcium, which would help counter the effects of the loss of vitamin D.”
“So a lot people who are avoiding dairy still need their source of calcium and the best source of calcium is naturally through cheese, yogurt, or milk.”
“But it is substantially lower in calcium than regular varieties (about 150 milligrams of calcium per 8 ounces versus the 300 to 450 milligrams in plain regular yogurt).”
“When they understood the mechanisms, the researchers developed a class of experimental drugs that block the leaks in calcium channels in the heart muscle.”
These user-created lists contain the word ‘calcium’.
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