English
flour mite
From flour + mite, due to their nature of being in flour.
Proto-Indo-European *mey- ‘small’
…
Proto-Germanic *mītǭ ‘biting insect’
Proto-West Germanic *mītā
Old English mīte ‘mite, tiny insect’
Middle English mite
English mite
Today it means
noun The mite Acarus siro, a pest of stored grains and flour.
Language periods are conventional ranges, not dates for this word.
Etymograph / flour mite