An abnormal and persistent anxiety about spiders. Individuals from arachnophobia experience excessive anxiety, while they realize the risk of encountering a spider and being harmed by it is small or nonexistent. They could prevent going barefoot and may also be especially aware whenever taking showers or engaging in and up out of bed.
1925, from brush. type of arachnid + -phobia "fear."
a morbid anxiety about spiders
Arachnophobia [Frank Marshall]