the GNU version of the Collaborative International Dictionary of English
adj. Pertaining to, or designating, an acid derived from coal tar and other sources. See phenol.
The Century Dictionary and Cyclopedia
Pertaining to or derived from carbon or coal.
Word Usage
"And it was not reported, it can be reported now that in the very beginning they had identified this very small area called the carbolic (ph) gap as their entranceway, basically, into Baghdad and into flanking and enveloping the Medina."