yes. infact, "ursine" actually means "bear" in greek. however, a few animals sometimes called bears aren't actually bears, like the red panda. the panda bear may or may not be a bear-it is debated by...
Ursine means bear-like. So what is the opposite of a bear?...Um... a ball-point pen? Or maybe a thunderstorm? Not really! Perhaps we could say 'NOT ursine'! But that doesn't help much, because...