Cadi

Cadi, CADI, or Cadí may refer to:

CADI:
 * Canadian Advanced Digital Ionosonde
 * Career and Academic Development Institute, high school in Philadelphia
 * Chengdu Aircraft Design Institute, an aircraft design institute located in Chengdu, China
 * Club Aeronautique Delisle Incorporated, Canadian aircraft manufacturer

Cadi/Cadí:
 * Cadi, Cadillac automobile
 * Cadi, Welsh equivalent of Katherine
 * Cadi Scientific, Singapore-based manufacturer of healthcare active RFID tags and systems
 * Toponyms:
 * Romansh name of Disentis Abbey and its territories, see Cadi (Surselva)
 * Cadi (Phrygia), town and bishopric of ancient Phrygia
 * Dharug name of Sydney and surrounds
 * (El) Cadí or Cady (river), in SW Europe