NORRISTOWN, Pa. — The former model Janice Dickinson told a jury Thursday that she could still remember Bill Cosby’s smell from an encounter with him in a Lake Tahoe hotel room in 1982. She had gone there to meet him, she said, but was feeling woozy from a pill he gave her for menstrual cramps.

“His robe opened,” she testified during the fourth day of Mr. Cosby’s retrial on sexual assault charges. “He smelled like cigar and espresso and his body odor.”

Ms. Dickinson, 27 at the time, said the pill paralyzed her, and Mr. Cosby, then 45, seized the opportunity to sexually assault her.

“Here was America’s Dad on top of me,” she said, “a happily married man with five children, on top of me.”