| ̷ ̷ ̷ ̷ at hydro- + noun
Etymology: hydr- + carbon
: any of a large class of organic compounds containing only carbon and hydrogen, comprising paraffins, olefins, members of the acetylene series, alicyclic hydrocarbons (as cyclic terpenes and steroid hydrocarbons), and aromatic hydrocarbons (as benzene, naphthalene, biphenyl), and occurring in many cases in petroleum, natural gas, coal, and bitumens
• hy·dro·car·bonaceous “+ adjective