— hydrocarbonaceous , adj.
/huy'dreuh kahr"beuhn, huy"dreuh kahr'-/ , n.
any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH 4 , an alkene, ethylene, C 2 H 4 , an alkyne, acetylene, C 2 H 2 , or an aromatic compound, benzene, C 6 H 6 .
[ 1820-30; HYDRO- 2 + CARBON ]