FireChat may catch on as a way to corral revelers, but that's just the beginning of its practical applications. For political organizers, it could become a critically important way to keep protesters and activists connected when their traditional forms of communicating get cut off.
Desiccators are sealable enclosures containing desiccants used for preserving moisture-sensitive items such as cobalt chloride paper for another use. A common use for desiccators is to protect chemicals which are hygroscopic or which react with water from humidity.
A relative term, also called a rhema or a rheme, is a logical term that requires reference to any number of other objects, called the correlates of the term, in order to denote a definite object, called the relate (pronounced with the accent on the first syllable) of the relative term in question.