When oxygen finds itself in contact with carbonaceous matter,-that is to say, with matter that contains carbon,-and when the surrounding temperature has reached the proper degree of heat, carbonic acid begins to be formed.
"In Search of a Son"
William Shepard Walsh
When much silica is diffused through the rock, we have a siliceous limestone; the presence of clay and of carbonaceous matter gives us argillaceous and carbonaceous limestones.
"Geology"
James Geikie
We have found fat-a carbonaceous food.
"Ontario Teachers' Manuals: Household Management"
Ministry of Education