This one’s kind of a mystery. It clearly means “stuck” but the word itself appears to be entirely an invention.
The thick inner membrane was visible now and this was what had been impeding the dragonet’s emergence. Jaxom ripped the slippery stuff open with his belt knife and, from the sac, fell a tiny white body, not much larger than Jaxom’s torso. Instinctively Jaxom reached out, helping the backstranded creature to its feet.