calcium

名词 n.
中文释义
美 /ˈkælsi.əm/

英文释义

名词 n.
  1. The chemical element (symbol Ca) with atomic number 20: a soft, silvery-white alkaline earth metal which occurs naturally as carbonate in limestone and as silicate in many rocks. countable,uncountable
    — Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.
  2. An atom of this element. countable

词形变化

calciums plural

词汇关系

衍生词
bismuth strontium calcium copper oxide calcaemia calc- calci- calcein calcemia calcic calcio- calcium-40 calcium-42 calcium-43 calcium-44 calcium-45 calcium-46 calcium-48 calcium acetate calcium arsenate calcium benzoate calcium bilirubinate calcium cannon calcium carbide calcium carbonate calcium channel blocker calcium chloride calcium chromate calcium copper tetrasilicate calcium cyanamide calcium diglutamate calcium dihydrogen phosphate calcium dioxide calcium disodium EDTA calcium ferrocyanide calcium fluoride calcium formate calcium fumarate calcium gluconate calcium guanylate calcium hydride calcium hydroxide calcium hypochlorite calcium inosinate calcium lactate calcium light calciumlike calcium magnesium carbonate calcium magnesium silicate calcium malate calcium montmorillonite calcium-montmorillonite calcium nitrate calcium nitride calcium oxalate calcium oxide calcium permanganate calcium peroxide calcium phosphate calcium phosphide calcium platinate calcium polyphosphate calcium propionate calcium pyrophosphate dihydrate deposition disease calcium silicate calcium sodium polyphosphate calcium sorbate calcium sulfate calcium sulphate calcium sulfide calcium sulphide calcium sulphite calcium tartrate calcium tungstate calcrete caldesmon calfluxin calprotectin calretinin calsulfhydryl cinacalcet decacalcium dicalcium fosamprenavir calcium heptacalcium hexacalcium monocalcium nonacalcium noncalcium octacalcium organocalcium oxycalcium pentacalcium proto-calcium radiocalcium tetracalcium tricalcium
相关词
BSCCO calcia calcite calculus calx Ca²⁺ chalk lime limestone

词源

Etymology tree
Latin calx
Proto-Indo-European *-om
Proto-Italic *-om
Latin -umder.
English -ium
English calcium
Coined by British chemist Humphry Davy in 1808, from Latin calx (“lime, limestone”) because it occurs in limestone. By surface analysis, calc- + -ium.
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