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“arachnologist”
A student of, or someone who is proficient in learning about spiders, scorpions, mites, and ticks: Jim's mother was an arachnologist and was an expert in the field of arachnids.
This entry is located in the following units:
arachno-, arachn- +
(page 3)
-ist
(page 7)
-ology, -logy, -ologist, -logist
(page 7)