Deliquesce \Del`i*quesce"\, v. i. [imp. & p. p. {Deliquesced}; p. pr. & vb. n. {Deliquescing}.] [L. deliquescere to melt, dissolve; de- + liquescere to become fluid, melt, fr. liquere to be fluid. See {Liquid}.] (Chem.) To dissolve gradually and become liquid by attracting and absorbing moisture from the air, as certain salts, acids, and alkalies.