cast iron

Từ điển Oxford Learners Wordfinder Dictionary

noun

an alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting (Freq. 1)
• Hypernyms:
iron, Fe, atomic number 26
• Hyponyms:
alloy iron, alloy cast iron, pot metal
• Substance Meronyms:
pearlite, pig iron