Source : Webster's Revised Unabridged Dictionary (1913)

Deliquescent \Del`i*ques"cent\, a. [L. deliquescens, -entis, p.
   pr. of deliquescere: cf. F. d['e]liquescent.]
   1. Dissolving; liquefying by contact with the air; capable of
      attracting moisture from the atmosphere and becoming
      liquid; as, deliquescent salts.

   2. (Bot.) Branching so that the stem is lost in branches, as
      in most deciduous trees. --Gray.

Source : WordNet®

deliquescent
     adj : (especially of certain salts) becoming liquid by absorbing
           moisture from the air