| a. | 1. | Of or pertaining to, or indicated by, the hygroscope; not readily manifest to the senses, but capable of detection by the hygroscope; |
| 2. | Having the property of readily inbibing moisture from the atmosphere, or of the becoming coated with a thin film of moisture, as glass, etc. |
| Adj. | 1. | hygroscopic - absorbing moisture (as from the air) |