n. An arrangement for drying moist substances, generally consisting of an apartment through which heated air passes, and which may also contain sulphuric acid, quicklime, or other absorbents.n. In chem., a vessel having a tightly fitting cover and containing strong sulphuric acid or other absorbent of moisture, in which chemical preparations are dried, or crucibles, etc., are allowed to cool before weighing. Also desiccator.