Ronda Rousey -- Hospitalized After Brutal Knock Out

Ronda Rousey has been transported to a hospital in Australia after suffering a devastating knock out during UFC 193.

A rep for the UFC tells TMZ Sports, "Ronda is currently being transported to a local hospital for precautionary purposes."

Ronda was knocked out in the 2nd round after taking a crushing kick to the neck by Holly Holm ... medical personnel rushed to her side in the octogon.

Ronda didn't speak to reporters after the fight -- instead, she was transported to a nearby hospital for medical attention.