I cannot find such a word ... except by Google in transcriptions of old death records and the like.
All of these examples are presumably from handwritten originals, so one must look at the original to make sure the transcription is correct.
My speculation is that the word might be an error for “inanition”: this would suggest that it was written in cursive with capital “I” looking something like a “2” and transcribed as “Q” (obviously requiring that the following “n” be read as “u").
“Inanition” would be an archaic medical term meaning essentially “starvation” but probably used as a generalization covering such things as “failure to thrive” (in more recent medical usage). I suppose it would have been applied to infants who wasted away for no definite reason.