caking property the capability of some coals which, when heated to certain temperatures, soften, become pasty and agglutinated, while the volatile matter, driven out through the sticky substance, causes it to become a cellular mass, yielding a coke or char on cooling GRM: n. Note: important in the manufacture of coke and for combustion on certain types of grate References: SEEvolatiles SEEvolatile product SEEvolatile matter SEEvolatile component