| Webster's Online Dictionary |
| Part of Speech | Definition | |
| Expression | 1. A crystalline compound, CoCl2 , of a pale rose color when hydrous, blue when dehydrated. Its solution is used for a sympathetic ink, the writing being nearly colorless when dried in the air, owing to absorbed moisture, and becoming bright blue when warmed.[Websters]. | |
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| Part of Speech | Definition | |
| Expression | 1. A crystalline compound, CoCl2 , of a pale rose color when hydrous, blue when dehydrated. Its solution is used for a sympathetic ink, the writing being nearly colorless when dried in the air, owing to absorbed moisture, and becoming bright blue when warmed.[Websters]. | |
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