From Dutch koolstof.

• Audio:

  (file)

koolstof (uncountable)

1. carbon

From kool (“coal”) +‎ stof (“stuff, substance”), calque of German Kohlenstoff.

• IPA^(key): /ˈkoːl.stɔf/

• Audio:

  (file)

• Hyphenation: kool‧stof

koolstof f (uncountable, no diminutive)

1. (chemistry) carbon

• Afrikaans: koolstof
• → Indonesian: zat arang (calque)
• → Japanese: 炭素 (calque)
• → West Frisian: koalstof