an abnormal or pathological fear of spiders.

Origin of arachnophobia

1925–30; < Greek aráchnē ‘spider’ + -phobia
Related formsa·rach·no·phobe, nouna·rach·no·pho·bic, adjective, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for arachnophobia

Contemporary Examples of arachnophobia

  • Arachnophobia is an irrational fear of spiders and claustrophobia is an irrational fear of small places.

    The Daily Beast logo
    Ground Zero Mosque Hurts Islam

    Douglas Murray

    August 12, 2010

British Dictionary definitions for arachnophobia



an abnormal fear of spiders
Derived Formsarachnophobic, adjective, noun

Word Origin for arachnophobia

C20: from Greek arakhnē spider + -phobia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for arachnophobia

1925, from comb. form of arachnid + -phobia "fear."

Online Etymology Dictionary, © 2010 Douglas Harper

arachnophobia in Medicine


[ə-răk′nə-fōbē-ə, -nō-]


An abnormal fear of spiders.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.