
1) Hiccup 2) Inborn reflex 3) Innate reflex 4) Instinctive reflex 5) Physiological reaction 6) Reflex 7) Singultus 8) Symptom 9) Unconditioned reflex 
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1) Hiccup 2) Singultus 
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• (n.) A modified respiratory movement; a spasmodic inspiration, consisting of a sudden contraction of the diaphragm, accompanied with closure of the glottis, so that further entrance of air is prevented, while the impulse of the column of air entering and striking upon the closed glottis produces a sound, or hiccough. • (v. i.) To have a...
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<physiology> A modified respiratory movement; a spasmodic inspiration, consisting of a sudden contraction of the diaphragm, accompanied with closure of the glottis, so that further entrance of air is prevented, while the impulse of the column of air entering and striking upon the closed glottis produces a sound, or hiccough. ... Alternative f...
Found on 
http://www.encyclo.co.uk/local/20973

(hik´әp) hiccup.
Found on 
http://www.encyclo.co.uk/local/21001
 Hic'cough  noun
Hic'cough  noun [ Middle English 
 hickup , 
 hicket , 
 hickock ; probably of imitative origin; confer D. & Danish 
 hik , Swedish 
 hicka , Armor. 
 hak , 
 hik , W. 
 ig , French 
 hoquet .] 
 (Physiol.) A modified respiratory movement; a spasmod...
Found on 
http://www.encyclo.co.uk/webster/H/42
 Hic'cough  intransitive verb
Hic'cough  intransitive verb [ 
 imperfect & past participle   Hiccoughed ; 
 present participle & verbal noun   Hiccoughing .] To have a hiccough or hiccoughs. 
Found on 
http://www.encyclo.co.uk/webster/H/43

Hiccough: A hiccough is an extraordinary type of breathing movement involving a sudden intake of air (inspiration) due to an involuntary contraction of the diaphragm accompanied by closure of the vocal apparatus (glottis) of the larynx. A hiccough is also called a hiccup. The abrupt inspiration is the result of a sudden contraction of the diaphragm...
Found on 
http://www.medterms.com/script/main/art.asp?articlekey=8894
  No exact match found.