Seidenberg suffered the laceration when a skate blade cut him during Saturday's game against the Kings in Los Angeles, and it has become infected. He was able to play the past two games, but the team's medical staff thought it best to keep him out Thursday.
"They stitched it up and everything was good, but a little infection has gotten into it now," Julien said. "He's on antibiotics, and to play it safe, we're going to keep him out (tonight). He's day to day, and it's not long-term."
With Seidenberg absent, Joe Corvo will be in the lineup. He has been a healthy scratch for the past six games.
Seidenberg could be back in the lineup Saturday against the New York Islanders.
"Hopefully we'll have him next game," Julien said.
Seidenberg missed the final four games of the 2009-10 regular season, and all of the playoffs, after he suffered a lacerated tendon in his forearm.