What is to shut off or out from a place or course, by something intervening; to intercept; to cut off; to interrupt. Mitford. So all passage of external air into the receiver may be intercluded. Boyle called?

interclude — To shut off or out from a place or course, by something intervening; to intercept; to cut off; to interrupt. Mitford. So all passage of external air into the receiver may be intercluded. Boyle. (Webster's 1913.)