A Delaware woman whose longtime companion is accused of waterboarding her daughter by holding the child's head under a faucet says the couple used the term jokingly for hair washing.
Jurors on Friday also watched a video in which Pauline Morse told police the alleged waterboarding by Melvin Morse usually lasted less than a minute.
She also reiterated that she witnessed only one such incident.
Melvin Morse, a former pediatrician, is accused of endangerment and assault and could get more than 20 years in prison if convicted.
He pleaded not guilty to charges of child endangerment and assault in November 2012.
As she did a day earlier, Pauline Morse was forced to admit several contradictions in her testimony and statements given to authorities.
Melvin Morse, who has researched near-death experiences involving children, denies police claims that he may have been experimenting on the girl.