An intense fear of crossing streets or being in streets and traffic, often related to anxiety about being exposed or vulnerable in open spaces.
From Greek 'agora' (marketplace/public square) and 'phobos' (fear), though some sources trace it to 'agyre' (street). It entered English psychiatric terminology in the 19th century as psychologists began categorizing specific phobias.
This is basically agoraphobia's cousin—while agoraphobia is fear of open spaces in general, agyrophobia zeroes in specifically on streets and traffic. Some people with this condition literally cannot cross a street even though they rationally know they're safe, which shows how powerful anxiety can override logic.
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