If one private key of a deterministic wallet gets compromised, are the other keys (and the seed) still secure?

Example: create an armory offline wallet with seed. In this case armory 0.90-beta installed in ubuntu 12.04 offline computer.

I want to transfer some BTC from one address in the offline armory wallet by importing the private key for one of the addresses in the offline wallet to a Bitcoin Core online wallet for whatever reason. If the private key is somehow compromised, are the remaining BTC on different addresses in the same armory offline wallet still secure (same seed)? Thanks!!