The Collaborative International Dictionary of English v.0.48:
Singultus \Sin*gul"tus\, n. [L.] (Med.) Hiccough. [1913 Webster]WordNet (r) 3.0 (2006):
singultus n 1: (usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion; "how do you cure the hiccups?" [syn: hiccup, hiccough, singultus]