pernicious vomiting

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forcible ejection of contents of stomach through the mouth. Called also emesis and regurgitation.
cyclic vomiting recurring attacks of vomiting.
dry vomiting attempts at vomiting, with the ejection of nothing but gas.
pernicious vomiting (vomiting of pregnancy) hyperemesis gravidarum.
projectile vomiting vomiting with the material ejected with great force; seen commonly in congenital pyloric obstruction.
stercoraceous vomiting vomiting of fecal matter.

per·ni·cious vom·it·ing

uncontrollable vomiting.

pernicious vomiting

Etymology: L, perniciosus, destructive, vomere, to vomit
a severe life-threatening episode of vomiting that may occur during pregnancy. Also called incoercible vomiting. See also hyperemesis gravidarum.

per·ni·cious vom·i·ting

(pĕr-nish'ŭs vom'it-ing)
Uncontrollable vomiting.