hermetical

The pressure of the neck of the bottle against this disk is such that the closing is absolutely hermetical.

His measure of usefulness became full in 1798 when the hermetical seal of death closed his bright career.

A sect of hermetical philosophers, founded in the fifteenth century, who were engaged in the study of abstruse sciences.

The closing is made hermetical by means of an India rubber tube, K, which presses against the glass and the cover.

The nuts are screwed up tight, and the flange of the door, compressing the rubber lining, renders the joint hermetical.