D defs.my
Entry 2 senses Webster, 1913

Credulous

/(kr?d"?-l?s; 135)/ · Cred·u·lous · IPA /ˈkɹɛd͡ʒələs/
01 a. Apt to believe on slight evidence; easily imposed upon; unsuspecting.
  1. 1.
    Apt to believe on slight evidence; easily imposed upon; unsuspecting.
    “Eve, our credulous mother.” Milton.
  2. 2.
    Believed too readily.[Obs.]