thán khí

== Vietnamese == === Etymology === Sino-Vietnamese word from 碳 (“carbon”) and 氣 (“gas”). The Chinese character 碳 (thán) is composed of 石 (thạch, “rock”, chemical radical for "non-gassy" nonmetal elements) + 炭 (thán, “coal”), due to the carbonic makeup of coal. See also than đá (“coal”) and Than Đá (“Carboniferous”) which are from Chinese 石炭 (thạch thán, literally “rocky coal”). Compare Chinese 炭氣 / 炭气 (thán khí). === Pronunciation === (Hà Nội) IPA(key): [tʰaːn˧˦ xi˧˦] (Huế) IPA(key): [tʰaːŋ˦˧˥ kʰɪj˨˩˦] (Saigon) IPA(key): [tʰaːŋ˦˥ kʰɪj˦˥] === Noun === thán khí (obsolete) carbon dioxide Synonym: cacbon đioxit === See also === dưỡng khí khinh khí