The Collaborative International Dictionary
Deliquium \De*liq"ui*um\, n. [L. See Deliquiate.]
(Chem.) A melting or dissolution in the air, or in a moist place; a liquid condition; as, a salt falls into a deliquium. [R.]
A sinking away; a swooning. [Obs.]
--Bacon.A melting or maudlin mood.
--Carlyle.
Wiktionary
n. 1 (context chemistry English) liquefaction through absorption of moisture from the air. 2 (context pathology English) An abrupt loss of consciousness usually caused by an insufficient blood flow to the brain; fainting. 3 (context literary figuratively English) A languid, maudlin mood. 4 (context rare English) An abrupt absence of sunlight, e.g. caused by an eclipse.
WordNet
Usage examples of "deliquium".
The result is dulness of sight, a stagnation of the vital circulations, and a general deliquium and sloughing off of all the intellectual faculties.
It was hard indeed to credit them with the deliquium of the vigorous Chief Constable that had shaken Bernard so badly.