atomic number 20

Từ điển Oxford Learners Wordfinder Dictionary

noun

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
• Syn:
calcium, Ca
• Derivationally related forms:
calcify (for: calcium)
• Hypernyms:
metallic element, metal
• Hyponyms:
calcium ion, factor IV
• Substance Holonyms:
calcium oxide, quicklime, lime, calx, calcined lime,
fluxing lime, unslaked lime, burnt lime, limestone, gypsum, fluorite,
fluorspar, fluor