[adj] having power or capacity or tendency to absorb or soak up (liquids); "as absorbent as a sponge"
absorbefacient, absorbent, assimilating, assimilative, assimilatory, hygroscopic, sorbefacient, spongelike, spongy, thirsty
\Ab*sorp"tive\, a. Having power, capacity, or tendency to absorb or imbibe. --E. Darwin.