carbon dioxide

== English == === Alternative forms === carbon dioxid, carbondioxid (obsolete) === Pronunciation === enPR: kär′bən dī-ŏk′sīd (Received Pronunciation) IPA(key): /ˌkɑː.bən daɪˈɒk.saɪd/ (General American) IPA(key): /ˌkɑɹ.bən daɪˈɑk.saɪd/ (Canada) IPA(key): /ˌkɑɹ.bən daɪˈɒk.saɪd/ (Australia) IPA(key): /ˌkɐː.bən dɑɪˈɒk.sɑɪd/ (New Zealand) IPA(key): /ˌkaː.bən daɪˈɒk.saɪd/ (Scotland) IPA(key): /ˌkaɹ.bən daɪˈɔk.saɪd/ Hyphenation: car‧bon di‧ox‧ide === Noun === carbon dioxide (uncountable) (inorganic chemistry) The normal oxide of carbon, CO₂; a colorless, odorless gas formed during respiration and combustion and consumed by plants during photosynthesis. Synonyms: carbonic acid gas, CO₂, (in food manufacture as an acidity regulator) E290 Hypernym: greenhouse gas Coordinate term: carbon monoxide ==== Usage notes ==== The O in CO2 must always be capitalized, otherwise the formula will be interpreted as a diatomic molecule of cobalt; translingual: compare CO to Co. ==== Derived terms ==== ==== Translations ==== ==== See also ==== carbon offset carbonate dry ice